JS: fix translation of enum entries without parentheses that call secondary constructors, constructors with default parameters and varargs. See KT-15900, KT-14097

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

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND: JS
-
 enum class Test(vararg xs: Int) {
     OK;
     val values = xs

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

@@ -1,6 +1,3 @@
-// IGNORE_BACKEND: JS
-// see KT-14097
-
 enum class Test(val x: Int, val str: String) {
     OK;
     constructor(x: Int = 0) : this(x, "OK")

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

@@ -1,6 +1,3 @@
-// IGNORE_BACKEND: JS
-// see KT-14097
-
 enum class Test(val x: Int, val str: String) {
     OK;
     constructor(vararg xs: Int) : this(xs.size + 42, "OK")