Enum deprecated syntax detection implemented and integrated into DeclarationsChecker.

A lot of tests was changed to refactor deprecated syntax. Six new tests were added to check deprecated syntax detection.
Diagnostic for "enum entry uses deprecated super constructor": constructor is highlighted
Diagnostic for "enum entry uses deprecated or no delimiter".
One warning removed.

compiler/testData/diagnostics/tests/classObjects/InnerClassAccessThroughEnum.kt

@@ -2,7 +2,7 @@ package a
 
 
 enum class C {
-    E1 E2 E3 {
+    E1, E2, E3 {
         object O_O
 
         fun b() {
@@ -10,7 +10,7 @@ enum class C {
         }
 
         class G
-    }
+    },
 
     E4 {
         fun c() {
@@ -22,7 +22,7 @@ enum class C {
             //TODO: this is a bug
             this.<!UNRESOLVED_REFERENCE!>A<!>()
         }
-    }
+    };
 
     class A
     inner class B