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/enumEntryInAbstractEnum.kt

@@ -2,11 +2,11 @@ enum class EnumClass {
     E1 {
         override fun foo() = 1
         override val bar: String = "a"
-    }
+    },
 
     <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>E2<!> {
 
-    }
+    };
 
     abstract fun foo(): Int
     abstract val bar: String