[JS IR] Avoid name clashes for @JsQualifier-annotated declarations

#KT-42039 Fixed

js/js.translator/testData/box/nameClashes/jsQualifier.kt

@@ -0,0 +1,16 @@
+// MODULE: lib
+// FILE: lib.kt
+@file:JsQualifier("chopchop.foo")
+
+external fun ok(): String
+
+// MODULE: lib2
+// FILE: lib2.kt
+
+@JsExport
+fun chopchop() {}
+
+// MODULE: main(lib, lib2)
+// FILE: main.kt
+
+fun box() = ok()