FIR2IR: populate overriddenSymbols for overriding functions

#KT-38416 Fixed

compiler/testData/codegen/box/bridges/abstractOverrideBridge.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 
 open class Base<T> {
     open fun f(x: T): String {

compiler/testData/codegen/box/bridges/bridgeInInterface.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FULL_JDK

compiler/testData/codegen/box/bridges/overrideReturnType.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class C {
     open fun f(): Any = "C f"
 }

compiler/testData/codegen/box/bridges/simpleEnum.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface A<T> {
     open fun foo(t: T) = "A"
 }

compiler/testData/codegen/box/bridges/simpleObject.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class A<T> {
     open fun foo(t: T) = "A"
 }

compiler/testData/codegen/box/bridges/strListRemove.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 // FILE: J.java

compiler/testData/codegen/box/bridges/substitutionInSuperClass/object.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class A<T> {
     open fun foo(t: T) = "A"
 }

compiler/testData/codegen/box/bridges/typeParameterInExtensionReceiver.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface A<T1> {
     fun <T2> T2.foo(x: T1): String
 }