[FIR] Don't generated fake-overrides for private declarations of actualized super classes

^KT-58252 Fixed

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/actualizer/MissingFakeOverridesAdder.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.backend.common.actualizer
 
 import org.jetbrains.kotlin.KtDiagnosticReporterWithImplicitIrBasedContext
 import org.jetbrains.kotlin.backend.common.CommonBackendErrors
+import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.builders.declarations.buildFun
 import org.jetbrains.kotlin.ir.builders.declarations.buildProperty
@@ -67,6 +68,7 @@ internal class MissingFakeOverridesAdder(
             val actualClass = expectActualMap[expectClass.symbol]?.owner as? IrClass ?: continue
             for (actualMember in actualClass.declarations) {
                 if (actualMember.isBuiltinMember() || actualMember in added) continue
+                if ((actualMember as? IrDeclarationWithVisibility)?.visibility == DescriptorVisibilities.PRIVATE) continue
                 addFakeOverride(actualMember, members, declaration)
             }
         }