[FIR] Rewrite redeclaration checks

#KT-60124 Fixed
#KT-60573 Fixed

compiler/testData/codegen/box/properties/genericWithSameName.kt

@@ -1,6 +1,4 @@
 // IGNORE_BACKEND: JVM, JVM_IR
-// IGNORE_BACKEND_K2: JS_IR, NATIVE, WASM
-// FIR status: not supported
 
 package foo
 
@@ -16,4 +14,4 @@ fun box(): String {
 
     return c1.p + c2.p
 
-}
+}