[FIR] Don't build redundant fake overrides for private members

The only case we may need fake override for private members is
a situation when class refers itself with different type arguments.
So in this commit we forbid such fake overrides when we can prove
that class does not refers itself here.

compiler/testData/codegen/box/classes/kt1134.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TODO: Enable when JS backend supports Java class library
 // TARGET_BACKEND: JVM
 public class SomeClass() : java.lang.Object() {

compiler/testData/codegen/box/jvm8/defaults/privateDefaultFromDefaultImpl.kt

@@ -1,5 +1,4 @@
 // !JVM_DEFAULT_MODE: enable
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // JVM_TARGET: 1.8
 // WITH_RUNTIME

compiler/testData/codegen/box/traits/noPrivateDelegation.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_BACKEND: JS_IR
 // TODO: muted automatically, investigate should it be ran for JS or not
 // IGNORE_BACKEND: JS, NATIVE

compiler/testData/codegen/box/traits/syntheticAccessor.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 var result = "fail"
 
 interface B {

compiler/testData/codegen/box/typealias/kt15109.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class A(private val s: String = "") {
     fun foo() = s
 }