KT-6244 Overloads with no default parameters should take over ones with defaults

#KT-6244 Fixed

compiler/testData/diagnostics/tests/callableReference/resolve/withAs.kt

@@ -6,5 +6,5 @@ fun foo(s: String) {}
 fun bar(f: () -> Unit) = 1
 fun bar(f: (String) -> Unit) = 2
 
-val x1 = ::<!OVERLOAD_RESOLUTION_AMBIGUITY!>foo<!> as () -> Unit
-val x2 = bar(::<!OVERLOAD_RESOLUTION_AMBIGUITY!>foo<!> as (String) -> Unit)
+val x1 = ::foo <!USELESS_CAST!>as () -> Unit<!>
+val x2 = bar(<!UNCHECKED_CAST!>::foo as (String) -> Unit<!>)