[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/privateInFile/topLevelAnnotationCall.fir.kt

@@ -17,11 +17,11 @@ class C1
 // FILE: 2.kt
 package pp
 
-@A(<!INAPPLICABLE_CANDIDATE!>foo<!>)
+@A(<!HIDDEN!>foo<!>)
 fun f2() {}
 
-@A(<!INAPPLICABLE_CANDIDATE!>foo<!>)
+@A(<!HIDDEN!>foo<!>)
 val p2 = ""
 
-@A(<!INAPPLICABLE_CANDIDATE!>foo<!>)
+@A(<!HIDDEN!>foo<!>)
 class C2