feat: add polyfills insertion for ES Next used features

js/js.translator/testData/box/polyfills/globalThis/globalThisWithExistedIntrinsic.kt

@@ -0,0 +1,12 @@
+// !LANGUAGE: +JsAllowInvalidCharsIdentifiersEscaping
+// TARGET_BACKEND: JS_IR
+// FILE: main.js
+this.globalThis = { "Is Just Created Global This": true }
+
+// FILE: main.kt
+external val `Is Just Created Global This`: Boolean
+
+fun box(): String {
+    assertEquals(`Is Just Created Global This`, true)
+    return "OK"
+}