[FIR] Fix tests (ARGUMENT_TYPE_MISMATCH instead of INCOMPATIBLE_CANDIDATE)

compiler/testData/diagnostics/tests/extensions/ExtensionsCalledOnSuper.fir.kt

@@ -17,6 +17,6 @@ class C : T {
         super.<!UNRESOLVED_REFERENCE!>bar<!>() // Error
         super.buzz() // OK, resolved to a member
         super.buzz1(<!NO_VALUE_FOR_PARAMETER!>)<!> // Resolved to an extension
-        super.<!INAPPLICABLE_CANDIDATE!>buzz1<!>("") // Resolved to a member
+        super.buzz1(<!ARGUMENT_TYPE_MISMATCH!>""<!>) // Resolved to a member
     }
-}
+}