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/inner/illegalModifier.kt

@@ -17,7 +17,7 @@ class D {
 enum class H {
     <!ILLEGAL_MODIFIER!>inner<!> I {
         inner class II
-    }
+    };
     
     inner class J
 }