[FIR] Fix local variable tests.

- Mangle names for extension receivers in lambdas
 - Correctly mark anonymous variables and variables for arguments
   for destructuring declaration.

There is one failure remaining which is cause by lambda
type inference differences that leads to FIR having an explicit
return from the lambda whereas old frontend leads to an implicit
return. This difference is visible in debug stepping that the
local variables tests do because the implicit return has the line
number of the closing brace of the lambda. This change adds an
IrText test to make the difference clear.

compiler/testData/ir/irText/firProblems/AllCandidates.fir.ir.txt

@@ -61,10 +61,10 @@ FILE fqName:<root> fileName:/AllCandidates.kt
             <R>: @[FlexibleNullability] A of <root>.allCandidatesResult?
           block: FUN_EXPR type=kotlin.Function1<@[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>?, kotlin.Unit> origin=LAMBDA
             FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> ($receiver:@[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>?) returnType:kotlin.Unit
-              $receiver: VALUE_PARAMETER name:<this> type:@[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>?
+              $receiver: VALUE_PARAMETER name:$this$apply type:@[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>?
               BLOCK_BODY
                 CALL 'public open fun setAllCandidates (allCandidates: @[FlexibleNullability] kotlin.collections.Collection<@[FlexibleNullability] <root>.ResolvedCall<@[FlexibleNullability] D of <root>.OverloadResolutionResultsImpl?>?>?): kotlin.Unit declared in <root>.OverloadResolutionResultsImpl' type=kotlin.Unit origin=EQ
-                  $this: GET_VAR '<this>: @[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>? declared in <root>.allCandidatesResult.<anonymous>' type=@[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>? origin=null
+                  $this: GET_VAR '$this$apply: @[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>? declared in <root>.allCandidatesResult.<anonymous>' type=@[FlexibleNullability] <root>.OverloadResolutionResultsImpl<@[FlexibleNullability] A of <root>.allCandidatesResult?>? origin=null
                   allCandidates: CALL 'public final fun map <T, R> (transform: kotlin.Function1<T of kotlin.collections.CollectionsKt.map, R of kotlin.collections.CollectionsKt.map>): kotlin.collections.List<R of kotlin.collections.CollectionsKt.map> [inline] declared in kotlin.collections.CollectionsKt' type=kotlin.collections.List<<root>.ResolvedCall<A of <root>.allCandidatesResult>> origin=null
                     <T>: <root>.MyCandidate
                     <R>: <root>.ResolvedCall<A of <root>.allCandidatesResult>

compiler/testData/ir/irText/firProblems/AllCandidates.fir.kt.txt

@@ -22,10 +22,11 @@ class MyCandidate {
 
 private fun <A : Any?> allCandidatesResult(allCandidates: Collection<MyCandidate>): @FlexibleNullability OverloadResolutionResultsImpl<@FlexibleNullability A?>? {
   return nameNotFound<@FlexibleNullability A?>().apply<@FlexibleNullability OverloadResolutionResultsImpl<@FlexibleNullability A?>?>(block = local fun @FlexibleNullability OverloadResolutionResultsImpl<@FlexibleNullability A?>?.<anonymous>() {
-    <this>.setAllCandidates(allCandidates = allCandidates.map<MyCandidate, ResolvedCall<A>>(transform = local fun <anonymous>(it: MyCandidate): ResolvedCall<A> {
+    $this$apply.setAllCandidates(allCandidates = allCandidates.map<MyCandidate, ResolvedCall<A>>(transform = local fun <anonymous>(it: MyCandidate): ResolvedCall<A> {
       return it.<get-resolvedCall>() as ResolvedCall<A>
     }
 ))
   }
 )
 }
+

compiler/testData/ir/irText/firProblems/typeVariableAfterBuildMap.fir.ir.txt

@@ -622,31 +622,31 @@ FILE fqName:<root> fileName:/typeVariableAfterBuildMap.kt
             <V>: kotlin.Int
             builderAction: FUN_EXPR type=kotlin.Function1<kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int>, kotlin.Unit> origin=LAMBDA
               FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> ($receiver:kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int>) returnType:kotlin.Unit
-                $receiver: VALUE_PARAMETER name:<this> type:kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int>
+                $receiver: VALUE_PARAMETER name:$this$buildMap type:kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int>
                 BLOCK_BODY
                   TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
                     CALL 'public abstract fun put (key: K of kotlin.collections.MutableMap, value: V of kotlin.collections.MutableMap): V of kotlin.collections.MutableMap? declared in kotlin.collections.MutableMap' type=kotlin.Int? origin=null
-                      $this: GET_VAR '<this>: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
+                      $this: GET_VAR '$this$buildMap: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
                       key: GET_OBJECT 'CLASS OBJECT name:PrivateToThis modality:FINAL visibility:public superTypes:[<root>.Visibility]' type=<root>.Visibilities.PrivateToThis
                       value: CONST Int type=kotlin.Int value=0
                   TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
                     CALL 'public abstract fun put (key: K of kotlin.collections.MutableMap, value: V of kotlin.collections.MutableMap): V of kotlin.collections.MutableMap? declared in kotlin.collections.MutableMap' type=kotlin.Int? origin=null
-                      $this: GET_VAR '<this>: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
+                      $this: GET_VAR '$this$buildMap: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
                       key: GET_OBJECT 'CLASS OBJECT name:Private modality:FINAL visibility:public superTypes:[<root>.Visibility]' type=<root>.Visibilities.Private
                       value: CONST Int type=kotlin.Int value=0
                   TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
                     CALL 'public abstract fun put (key: K of kotlin.collections.MutableMap, value: V of kotlin.collections.MutableMap): V of kotlin.collections.MutableMap? declared in kotlin.collections.MutableMap' type=kotlin.Int? origin=null
-                      $this: GET_VAR '<this>: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
+                      $this: GET_VAR '$this$buildMap: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
                       key: GET_OBJECT 'CLASS OBJECT name:Internal modality:FINAL visibility:public superTypes:[<root>.Visibility]' type=<root>.Visibilities.Internal
                       value: CONST Int type=kotlin.Int value=1
                   TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
                     CALL 'public abstract fun put (key: K of kotlin.collections.MutableMap, value: V of kotlin.collections.MutableMap): V of kotlin.collections.MutableMap? declared in kotlin.collections.MutableMap' type=kotlin.Int? origin=null
-                      $this: GET_VAR '<this>: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
+                      $this: GET_VAR '$this$buildMap: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
                       key: GET_OBJECT 'CLASS OBJECT name:Protected modality:FINAL visibility:public superTypes:[<root>.Visibility]' type=<root>.Visibilities.Protected
                       value: CONST Int type=kotlin.Int value=1
                   TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
                     CALL 'public abstract fun put (key: K of kotlin.collections.MutableMap, value: V of kotlin.collections.MutableMap): V of kotlin.collections.MutableMap? declared in kotlin.collections.MutableMap' type=kotlin.Int? origin=null
-                      $this: GET_VAR '<this>: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
+                      $this: GET_VAR '$this$buildMap: kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> declared in <root>.Visibilities.ORDERED_VISIBILITIES.<anonymous>' type=kotlin.collections.MutableMap<<root>.Visibility, kotlin.Int> origin=null
                       key: GET_OBJECT 'CLASS OBJECT name:Public modality:FINAL visibility:public superTypes:[<root>.Visibility]' type=<root>.Visibilities.Public
                       value: CONST Int type=kotlin.Int value=2
       FUN DEFAULT_PROPERTY_ACCESSOR name:<get-ORDERED_VISIBILITIES> visibility:private modality:FINAL <> ($this:<root>.Visibilities) returnType:kotlin.collections.Map<<root>.Visibility, kotlin.Int>

compiler/testData/ir/irText/firProblems/typeVariableAfterBuildMap.fir.kt.txt

@@ -163,13 +163,14 @@ object Visibilities {
 
   private val ORDERED_VISIBILITIES: Map<Visibility, Int>
     field = buildMap<Visibility, Int>(builderAction = local fun MutableMap<Visibility, Int>.<anonymous>() {
-      <this>.put(key = PrivateToThis, value = 0) /*~> Unit */
-      <this>.put(key = Private, value = 0) /*~> Unit */
-      <this>.put(key = Internal, value = 1) /*~> Unit */
-      <this>.put(key = Protected, value = 1) /*~> Unit */
-      <this>.put(key = Public, value = 2) /*~> Unit */
+      $this$buildMap.put(key = PrivateToThis, value = 0) /*~> Unit */
+      $this$buildMap.put(key = Private, value = 0) /*~> Unit */
+      $this$buildMap.put(key = Internal, value = 1) /*~> Unit */
+      $this$buildMap.put(key = Protected, value = 1) /*~> Unit */
+      $this$buildMap.put(key = Public, value = 2) /*~> Unit */
     }
 )
     private get
 
 }
+