[FIR] Support of REDECLARATION for local val/var, ^KT-54405 Fixed

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/negative/missingBooleanBranch.fir.txt

@@ -32,7 +32,7 @@ FILE: missingBooleanBranch.kt
             }
         }
 
-        lval x: R|kotlin/Int| = when (R|<local>/cond|) {
+        lval y: R|kotlin/Int| = when (R|<local>/cond|) {
             ==($subj$, Boolean(true)) ->  {
                 Int(1)
             }

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/negative/missingBooleanBranch.kt

@@ -19,7 +19,7 @@ fun test_2(cond: Boolean?) {
         false -> 2
     }
 
-    val x = when (cond) {
+    val y = when (cond) {
         true -> 1
         false -> 2
         null -> 3

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveness_enum.fir.txt

@@ -74,7 +74,7 @@ FILE: exhaustiveness_enum.kt
             }
         }
 
-        lval a: R|kotlin/Int| = when (R|<local>/e|) {
+        lval b: R|kotlin/Int| = when (R|<local>/e|) {
             ==($subj$, Q|Enum|.R|/Enum.A|) ->  {
                 Int(1)
             }
@@ -89,7 +89,7 @@ FILE: exhaustiveness_enum.kt
             }
         }
 
-        lval a: R|kotlin/Int| = when (R|<local>/e|) {
+        lval c: R|kotlin/Int| = when (R|<local>/e|) {
             ==($subj$, Q|Enum|.R|/Enum.A|) ->  {
                 Int(1)
             }

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveness_enum.kt

@@ -33,14 +33,14 @@ fun test_2(e: Enum?) {
         Enum.C -> 3
     }
 
-    val a = when (e) {
+    val b = when (e) {
         Enum.A -> 1
         Enum.B -> 2
         Enum.C -> 3
         null -> 4
     }
 
-    val a = when (e) {
+    val c = when (e) {
         Enum.A -> 1
         Enum.B -> 2
         Enum.C -> 3

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveness_enumJava.fir.txt

@@ -56,7 +56,7 @@ FILE: main.kt
             }
         }
         .<Unresolved name: plus>#(Int(0))
-        lval a: R|kotlin/Int| = when (R|<local>/e|) {
+        lval b: R|kotlin/Int| = when (R|<local>/e|) {
             ==($subj$, Q|JavaEnum|.R|/JavaEnum.A|) ->  {
                 Int(1)
             }
@@ -71,7 +71,7 @@ FILE: main.kt
             }
         }
         .R|kotlin/Int.plus|(Int(0))
-        lval a: R|kotlin/Int| = when (R|<local>/e|) {
+        lval c: R|kotlin/Int| = when (R|<local>/e|) {
             ==($subj$, Q|JavaEnum|.R|/JavaEnum.A|) ->  {
                 Int(1)
             }

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveness_enumJava.kt

@@ -37,14 +37,14 @@ fun test_2(e: JavaEnum?) {
         JavaEnum.C -> 3
     }.<!UNRESOLVED_REFERENCE!>plus<!>(0)
 
-    val a = when (e) {
+    val b = when (e) {
         JavaEnum.A -> 1
         JavaEnum.B -> 2
         JavaEnum.C -> 3
         null -> 4
     }.plus(0)
 
-    val a = when (e) {
+    val c = when (e) {
         JavaEnum.A -> 1
         JavaEnum.B -> 2
         JavaEnum.C -> 3