[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/scopes/inheritance/statics/hidePrivateByPublic.fir.kt

@@ -23,8 +23,8 @@ class B extends A {
 // FILE: test.kt
 
 fun test() {
-    A.<!INAPPLICABLE_CANDIDATE!>a<!>
-    A.<!INAPPLICABLE_CANDIDATE!>foo<!>()
+    A.<!HIDDEN!>a<!>
+    A.<!HIDDEN!>foo<!>()
     A.b
     A.bar()
     B.a