[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/enum/ConstructorCallFromOutside.fir.kt

@@ -6,5 +6,5 @@ enum class A(val c: Int) {
 
 fun createA(): A {
     // Error should be here!
-    return <!INAPPLICABLE_CANDIDATE!>A<!>(10)
+    return <!HIDDEN!>A<!>(10)
 }