[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/multiplatform/enum/constructorInHeaderEnum.fir.kt

@@ -3,11 +3,11 @@
 // FILE: common.kt
 
 expect enum class En(x: Int) {
-    <!INAPPLICABLE_CANDIDATE!>E1,<!>
+    <!NONE_APPLICABLE!>E1,<!>
     E2(42),
     ;
 
-    <!INAPPLICABLE_CANDIDATE!>constructor(s: String)<!>
+    <!NONE_APPLICABLE!>constructor(s: String)<!>
 }
 
 expect enum class En2 {

compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.fir.kt

@@ -8,7 +8,7 @@ expect open class A {
 }
 
 expect class B : A {
-    <!INAPPLICABLE_CANDIDATE!>constructor(i: Int)<!>
+    <!NONE_APPLICABLE!>constructor(i: Int)<!>
 
     constructor() : super("B")
 }

compiler/testData/diagnostics/tests/multiplatform/namedArguments.fir.kt

@@ -4,7 +4,7 @@
 // FILE: common.kt
 
 expect class Foo(zzz: Int) {
-    <!INAPPLICABLE_CANDIDATE!>constructor(aaa: Boolean)<!>
+    <!NONE_APPLICABLE!>constructor(aaa: Boolean)<!>
 
     fun f1(xxx: String): String
 }