[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/syntheticExtensions/javaProperties/SetterHasHigherAccess.fir.kt

@@ -4,13 +4,13 @@ package k
 import JavaClass
 
 fun foo(javaClass: JavaClass) {
-    val v = javaClass.<!INAPPLICABLE_CANDIDATE!>something<!>
-    javaClass.<!INAPPLICABLE_CANDIDATE!>something<!> = 1
-    javaClass.<!INAPPLICABLE_CANDIDATE, INAPPLICABLE_CANDIDATE!>something<!><!UNRESOLVED_REFERENCE!>++<!>
+    val v = javaClass.<!HIDDEN!>something<!>
+    javaClass.<!HIDDEN!>something<!> = 1
+    javaClass.<!HIDDEN, HIDDEN!>something<!>++
 }
 
 // FILE: JavaClass.java
 public class JavaClass {
     protected int getSomething() { return 1; }
     public void setSomething(int value) {}
-}
+}