FIR2IR: populate overriddenSymbols for overriding functions

#KT-38416 Fixed

compiler/testData/codegen/box/defaultArguments/function/abstractClass.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 abstract class Base {
     abstract fun foo(a: String = "abc"): String
 }

compiler/testData/codegen/box/defaultArguments/function/complexInheritance.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // See KT-21968
 
 interface A {

compiler/testData/codegen/box/defaultArguments/function/covariantOverride.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class Foo {
     open fun foo(x: CharSequence = "O"): CharSequence = x
 }

compiler/testData/codegen/box/defaultArguments/function/covariantOverrideGeneric.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class Foo {
     open fun foo(x: CharSequence = "O"): CharSequence = x
 }

compiler/testData/codegen/box/defaultArguments/function/funInTrait.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface Foo {
     fun foo(a: Double = 1.0): Double
 }

compiler/testData/codegen/box/defaultArguments/function/kt36188.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_BACKEND: JS
 
 // Test for KT-36188 bug compatibility between non-IR and IR backends

compiler/testData/codegen/box/defaultArguments/function/kt36188_2.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_BACKEND: JS
 
 // Test for KT-36188 bug compatibility between non-IR and IR backends

compiler/testData/codegen/box/defaultArguments/function/kt5232.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface A {
     fun visit(a:String, b:String="") : String = b + a
 }

compiler/testData/codegen/box/defaultArguments/function/trait.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface Base {
     fun bar(a: String = "abc"): String = a + " from interface"
 }