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/enum/enumImplementingTrait.kt

@@ -5,7 +5,7 @@ interface T1 {
 enum class EnumImplementingTraitWithFun: T1 {
     E1 {
         override fun foo() {}
-    }
+    },
     <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>E2<!>
 }
 
@@ -16,6 +16,6 @@ interface T2 {
 enum class EnumImplementingTraitWithVal: T2 {
     E1 {
         override val bar = 1
-    }
+    },
     <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>E2<!>
 }