[FIR] Report INAPPLICABLE_CANDIDATE or more specific diagnostic for callable references

... instead of just UNRESOLVED_REFERENCE when something went wrong
during resolution.

#KT-59401 related

compiler/testData/diagnostics/tests/callableReference/kt46437.fir.kt

@@ -1,5 +1,5 @@
 fun box(): String {
-    if (true) X::<!UNRESOLVED_REFERENCE!>y<!> else null
+    if (true) X::<!INVISIBLE_REFERENCE!>y<!> else null
     return "OK"
 }