[FIR] By default, only hide members from mapped scope but not overrides

This affects methods like List.getFirst/getLast where it was decided
to keep them hidden but to make them visible on overrides like
ArrayList or LinkedList.
The goal is to prevent a breaking change since some implementations
like LinkedList had this method before JDK 21.

#KT-65438

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/handlers/FirScopeDumpHandler.kt

@@ -146,7 +146,7 @@ class FirScopeDumpHandler(testServices: TestServices) : FirAnalysisHandler(testS
     private fun SmartPrinter.printInfo(declaration: FirCallableDeclaration, scope: FirTypeScope, counter: SymbolCounter) {
         val origin = declaration.origin.takeUnless { it == FirDeclarationOrigin.BuiltIns } ?: FirDeclarationOrigin.Library
         print("[$origin]: ")
-        if (declaration.isHiddenEverywhereBesideSuperCalls == true) {
+        if (declaration.isHiddenEverywhereBesideSuperCalls != null) {
             print("/* hidden beside supers */ ")
         } else if (declaration.isHiddenToOvercomeSignatureClash == true) {
             print("/* hidden due to clash */ ")