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/openMemberInEnum.kt

@@ -2,12 +2,12 @@ enum class EnumWithOpenMembers {
     E1 {
         override fun foo() = 1
         override val bar: String = "a"
-    }
+    },
 
     E2 {
         <!OVERRIDING_FINAL_MEMBER!>override<!> fun f() = 3
         <!OVERRIDING_FINAL_MEMBER!>override<!> val b = 4
-    }
+    };
 
     open fun foo() = 1
     open val bar: String = ""