FIR2IR: fix generation of source overridden symbols

This commit makes source overridden and f/o overridden consistent.

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt

@@ -406,25 +406,33 @@ fun FirTypeScope.processOverriddenFunctionsFromSuperClasses(
     functionSymbol: FirNamedFunctionSymbol,
     containingClass: FirClass,
     processor: (FirNamedFunctionSymbol) -> ProcessorAction
-): ProcessorAction = processDirectOverriddenFunctionsWithBaseScope(functionSymbol) { overridden, baseScope ->
-    if (overridden.containingClass() == containingClass.symbol.toLookupTag()) {
-        baseScope.processOverriddenFunctionsFromSuperClasses(overridden, containingClass, processor)
-    } else {
-        processor(overridden)
+): ProcessorAction =
+    processDirectOverriddenFunctionsWithBaseScope(functionSymbol) { overridden, _ ->
+        val unwrapped = if (overridden.fir.isSubstitutionOverride &&
+            overridden.dispatchReceiverClassOrNull() == containingClass.symbol.toLookupTag()
+        )
+            overridden.originalForSubstitutionOverride!!
+        else
+            overridden
+
+        processor(unwrapped)
     }
-}
 
 fun FirTypeScope.processOverriddenPropertiesFromSuperClasses(
     propertySymbol: FirPropertySymbol,
     containingClass: FirClass,
     processor: (FirPropertySymbol) -> ProcessorAction
-): ProcessorAction = processDirectOverriddenPropertiesWithBaseScope(propertySymbol) { overridden, baseScope ->
-    if (overridden.containingClass() == containingClass.symbol.toLookupTag()) {
-        baseScope.processOverriddenPropertiesFromSuperClasses(overridden, containingClass, processor)
-    } else {
-        processor(overridden)
+): ProcessorAction =
+    processDirectOverriddenPropertiesWithBaseScope(propertySymbol) { overridden, _ ->
+        val unwrapped = if (overridden.fir.isSubstitutionOverride &&
+            overridden.dispatchReceiverClassOrNull() == containingClass.symbol.toLookupTag()
+        )
+            overridden.originalForSubstitutionOverride!!
+        else
+            overridden
+
+        processor(unwrapped)
     }
-}
 
 private fun FirClass.getSuperTypesAsIrClasses(
     declarationStorage: Fir2IrDeclarationStorage

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

@@ -12,7 +12,6 @@ FILE fqName:<root> fileName:/AbstractMutableMap.kt
     FUN name:put visibility:public modality:FINAL <> ($this:<root>.MyMap<K of <root>.MyMap, V of <root>.MyMap>, key:K of <root>.MyMap, value:V of <root>.MyMap) returnType:V of <root>.MyMap?
       overridden:
         public abstract fun put (key: K of kotlin.collections.AbstractMutableMap, value: V of kotlin.collections.AbstractMutableMap): V of kotlin.collections.AbstractMutableMap? declared in kotlin.collections.AbstractMutableMap
-        public open fun put (p0: @[FlexibleNullability] K of kotlin.collections.AbstractMutableMap?, p1: @[FlexibleNullability] V of kotlin.collections.AbstractMutableMap?): V of kotlin.collections.AbstractMutableMap? [fake_override] declared in kotlin.collections.AbstractMutableMap
       $this: VALUE_PARAMETER name:<this> type:<root>.MyMap<K of <root>.MyMap, V of <root>.MyMap>
       VALUE_PARAMETER name:key index:0 type:K of <root>.MyMap
       VALUE_PARAMETER name:value index:1 type:V of <root>.MyMap

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

@@ -203,8 +203,6 @@ FILE fqName:<root> fileName:/ArrayListOverrides.kt
     FUN name:remove visibility:public modality:FINAL <> ($this:<root>.A2, x:kotlin.String) returnType:kotlin.Boolean
       overridden:
         public open fun remove (p0: @[EnhancedNullability] E of java.util.ArrayList): kotlin.Boolean declared in java.util.ArrayList
-        public open fun remove (p0: @[FlexibleNullability] E of java.util.ArrayList?): kotlin.Boolean [fake_override] declared in java.util.ArrayList
-        public abstract fun remove (element: E of java.util.ArrayList): kotlin.Boolean [fake_override] declared in java.util.ArrayList
       $this: VALUE_PARAMETER name:<this> type:<root>.A2
       VALUE_PARAMETER name:x index:0 type:kotlin.String
       BLOCK_BODY