[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/resolve/noCandidates/resolvedToClassifier.fir.kt

@@ -9,11 +9,11 @@ fun test() {
     val interface_as_fun = <!UNRESOLVED_REFERENCE!>A<!>()
     val interface_as_val = A
 
-    val object_as_fun = <!INAPPLICABLE_CANDIDATE!>B<!>()
+    val object_as_fun = <!HIDDEN!>B<!>()
     val class_as_val = C
 }
 
 fun <T> bar() {
     val typeParameter_as_val = <!OTHER_ERROR, OTHER_ERROR!>T<!>
     val typeParameter_as_fun = <!UNRESOLVED_REFERENCE!>T<!>()
-}
+}