[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/inference/reportingImprovements/reportUnresolvedReferenceWrongReceiverForManyCandidates.fir.kt

@@ -1,8 +1,8 @@
 fun test() {
-    val a = <!INAPPLICABLE_CANDIDATE!>-<!>false
+    val a = <!NONE_APPLICABLE!>-<!>false
 }
 
 operator fun A.unaryMinus() {}
 operator fun B.unaryMinus() {}
 class A
-class B
+class B