Fix enum entry class delegating constructor call generation

When the enum entry requires a specific class, its constructor should
invoke proper supertype constructor (from the corresponding enum class).
Corresponding resolved call should be passed from the front-end in
CONSTRUCTOR_RESOLVED_DELEGATION_CALL slice.
In case of enum entries without explicit supertype initializer, this
information was missing.

compiler/testData/codegen/box/enum/defaultCtor/entryClassConstructorWithDefaultArguments.kt

@@ -0,0 +1,8 @@
+enum class Test(val str: String = "OK") {
+    OK {
+        fun foo() {}
+    }
+}
+
+fun box(): String =
+        Test.OK.str

compiler/testData/codegen/box/enum/defaultCtor/entryClassConstructorWithVarargs.kt

@@ -0,0 +1,12 @@
+// IGNORE_BACKEND: JS
+
+
+enum class Test(vararg xs: Int) {
+    OK {
+        fun foo() {}
+    };
+    val xs = xs
+}
+
+fun box(): String =
+        if (Test.OK.xs.size == 0) "OK" else "Fail"