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/secondaryConstructors/constructorInObject.kt

@@ -4,7 +4,7 @@ object A {
 }
 
 enum class B {
-    X : B() {
+    X() {
         <!SECONDARY_CONSTRUCTOR_IN_OBJECT!>constructor()
  <!>}
 }

compiler/testData/diagnostics/tests/secondaryConstructors/enums.kt

@@ -1,6 +1,6 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 enum class A {
-    W: A(1) X: A(1, 2) Y: A(3.0) Z: A("") E: A()
+    W(1), X(1, 2), Y(3.0), Z(""), E();
 
     constructor()
     constructor(x: Int)
@@ -10,7 +10,7 @@ enum class A {
 }
 
 enum class B(x: Int) {
-    W: B(1) X: B(1, 2) Y: B(3.0) Z: B("")
+    W(1), X(1, 2), Y(3.0), Z("");
 
     constructor(x: Int, y: Int): this(x+y)
     constructor(x: Double): this(x.toInt(), 1)
@@ -18,20 +18,20 @@ enum class B(x: Int) {
 }
 
 enum class C {
-    EMPTY: C() // may be we should avoid explicit call here
+    EMPTY(); // may be we should avoid explicit call here
     constructor()
 }
 
 enum class D(val prop: Int) {
-    X: D(123) {
+    X(123) {
         override fun f() = 1
-    }
-    Y: D() {
+    },
+    Y() {
         override fun f() = prop
-    }
-    Z: D("abc") {
+    },
+    Z("abc") {
         override fun f() = prop
-    }
+    };
 
     constructor(): this(1)
     constructor(x: String): this(x.length())