[FIR] Check conflicting overloads via scopes

Scopes may return private symbols from
supertypes, they should not clash with
symbols from the current class.

For example, see:
`FirLightTreeBlackBoxCodegenWithIrFakeOverrideGeneratorTestGenerated.FakeOverride#testPrivateFakeOverrides1`

Lombok shouldn't generate functions if the
user has defined explicit ones.

In K1 generated functions are not really
added to the declared members scope.

^KT-61243 Fixed

compiler/testData/diagnostics/tests/redeclarations/EnumName.fir.kt

@@ -1,3 +1,5 @@
-enum class A {
-    name
+enum class <!REDECLARATION, REDECLARATION!>A<!> {
+    <!REDECLARATION!>name<!>,
+    <!REDECLARATION!>ordinal<!>,
+    <!DEPRECATED_DECLARATION_OF_ENUM_ENTRY!>entries,<!>
 }

compiler/testData/diagnostics/tests/redeclarations/EnumName.kt

@@ -1,3 +1,5 @@
 enum class A {
-    <!REDECLARATION!>name<!>
+    <!REDECLARATION!>name<!>,
+    <!REDECLARATION!>ordinal<!>,
+    <!DEPRECATED_DECLARATION_OF_ENUM_ENTRY!>entries,<!>
 }

compiler/testData/diagnostics/tests/redeclarations/EnumName.txt

@@ -3,6 +3,10 @@ package
 public final enum class A : kotlin.Enum<A> {
     enum entry name
 
+    enum entry ordinal
+
+    enum entry entries
+
     private constructor A()
     @kotlin.internal.IntrinsicConstEvaluation public final override /*1*/ /*fake_override*/ val name: kotlin.String
     public final override /*1*/ /*fake_override*/ val ordinal: kotlin.Int

compiler/testData/diagnostics/tests/redeclarations/TypeAliasCtorVsFun.fir.kt

@@ -1,14 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER -TOPLEVEL_TYPEALIASES_ONLY
-class C(val x: Int)
-
-<!CONFLICTING_OVERLOADS!>typealias CC = C<!>
-
-<!CONFLICTING_OVERLOADS!>fun CC(x: Int)<!> = x
-
-class Outer {
-    class C(val x: Int)
-
-    typealias CC = C
-
-    fun CC(x: Int) = x
-}

compiler/testData/diagnostics/tests/redeclarations/TypeAliasCtorVsFun.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER -TOPLEVEL_TYPEALIASES_ONLY
 class C(val x: Int)