FIR: add proper receiver check for protected visibility #KT-48378 Fixed

compiler/testData/diagnostics/tests/scopes/protectedVisibility/unstableSmartCast.fir.kt

@@ -11,8 +11,8 @@ fun BaseOuter.foo(): String = ""
 class Derived : BaseOuter() {
     fun test(foo: Foo) {
         if (foo.base is Derived) {
-            foo.base.foo() checkType { <!UNRESOLVED_REFERENCE_WRONG_RECEIVER!>_<!><String>() } // Resolved to extension
-            foo.base.bar()
+            foo.base.foo() checkType { _<String>() } // Resolved to extension
+            foo.base.<!INVISIBLE_REFERENCE!>bar<!>()
         }
     }
 }