[FIR] Improve diagnostic reporting & don't use error symbol for candidate if possible

Also introduce few new diagnostics:
- NONE_APPLICABLE more many inapplicable candidates
- HIDDEN for visible candidates

compiler/testData/diagnostics/tests/j+k/sam/privateCandidatesWithWrongArguments.fir.kt

@@ -17,5 +17,5 @@ public class A {
 package bar
 
 fun main() {
-    foo.A.<!INAPPLICABLE_CANDIDATE!>f<!> {}
-}
+    foo.A.<!HIDDEN!>f<!> {}
+}