Extract method to fully or partially resolve callable reference

Reuse it in the main type-checking path in DoubleColonExpressionResolver, as
well as in ArgumentTypeResolver which handles the case when a callable
reference appears as an argument to another call

compiler/testData/diagnostics/tests/callableReference/function/unresolved.kt

@@ -8,5 +8,5 @@ fun main() {
     
     A::<!UNRESOLVED_REFERENCE!>bar<!>
     
-    <!UNRESOLVED_REFERENCE!>B<!>::<!OVERLOAD_RESOLUTION_AMBIGUITY!>bar<!>
-}
+    <!UNRESOLVED_REFERENCE!>B<!>::<!UNRESOLVED_REFERENCE!>bar<!>
+}