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/enumEntries.kt

@@ -1,10 +1,10 @@
 enum class E {
     E1 {
         override fun foo() = outerFun() + super.outerFun()
-    }
+    },
     E2 {
         override fun foo() = E1.foo()
-    }
+    };
     
     abstract fun foo(): Int
     

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
 }

compiler/testData/diagnostics/tests/inner/qualifiedExpression/enumConstant.kt

@@ -1,6 +1,6 @@
 enum class E {
-    E1
-    E2 { }
+    E1,
+    E2 { };
 }
 
 fun foo() = E.E1

compiler/testData/diagnostics/tests/inner/qualifiedExpression/nestedEnumConstant.kt

@@ -1,7 +1,7 @@
 class A {
     enum class E {
-        E1
-        E2 { }
+        E1,
+        E2 { };
     }
 }