[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/exposed/exceptionOnFakeInvisible.fir.kt

@@ -7,6 +7,6 @@ fun bar(arg: String) = arg
 class Derived : Base("123") {
 
     private inline fun foo() {
-        bar(<!INAPPLICABLE_CANDIDATE!>v<!>)
+        bar(<!HIDDEN!>v<!>)
     }
 }