[K/JS] Rework member-exportability check in a right way ^KT-61957 Fixed

js/js.translator/testData/box/enum/enumEntriesOnExportedEnum.kt

@@ -0,0 +1,19 @@
+// !LANGUAGE: +EnumEntries
+// IGNORE_BACKEND: JS
+// KJS_WITH_FULL_RUNTIME
+// KT-61957
+
+@JsExport
+enum class SomeEnum {
+    A,B;
+    companion object {
+        @JsName("fromName")
+        fun fromName(name: String): SomeEnum? {
+            return SomeEnum.entries.find { name == it.name }
+        }
+    }
+}
+
+fun box(): String {
+   return if (SomeEnum.fromName("A") == SomeEnum.A) "OK" else "SomeEnum.fromName(\"A\") != SomeEnum.A"
+}