[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/delegatedProperty/propertyDefferedType.fir.kt

@@ -5,7 +5,7 @@
 import kotlin.reflect.KProperty
 
 class B {
-    val c by <!UNRESOLVED_REFERENCE!><!INAPPLICABLE_CANDIDATE!>Delegate<!>(<!UNRESOLVED_REFERENCE!>ag<!>)<!>
+    val c by <!INAPPLICABLE_CANDIDATE!><!INAPPLICABLE_CANDIDATE!>Delegate<!>(<!UNRESOLVED_REFERENCE!>ag<!>)<!>
 }
 
 class Delegate<T: Any>(val init: T) {

compiler/testData/diagnostics/tests/delegatedProperty/thisInDelegate.fir.kt

@@ -5,7 +5,7 @@ import kotlin.reflect.KProperty
 val Int.a by Delegate(this)
 
 class A {
-  val Int.a by <!UNRESOLVED_REFERENCE!><!INAPPLICABLE_CANDIDATE!>Delegate<!>(this)<!>
+  val Int.a by <!INAPPLICABLE_CANDIDATE!>Delegate<!>(this)
 }
 
 class Delegate(i: Int) {

compiler/testData/diagnostics/tests/delegatedProperty/twoGetMethods.fir.kt

@@ -3,7 +3,7 @@
 import kotlin.reflect.KProperty
 
 class A {
-    val c: Int by <!INAPPLICABLE_CANDIDATE!>Delegate()<!>
+    val c: Int by <!NONE_APPLICABLE!>Delegate()<!>
 }
 
 class Delegate {