[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/j+k/sam/referenceToSamFunctionAgainstExpectedType.fir.kt

@@ -18,7 +18,7 @@ public class Inv<T> {
 
 fun test(inv: Inv<String>) {
     val m: ((String) -> String) -> Inv<String> = <!INITIALIZER_TYPE_MISMATCH!>inv::<!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>map<!><!>
-    take(inv::<!UNRESOLVED_REFERENCE!>map<!>)
+    take(inv::<!INAPPLICABLE_CANDIDATE!>map<!>)
 }
 
 fun take(f: ((String) -> String) -> Inv<String>) {}