patch 8.2.4176: Vim9: cannot use imported function with call()

Problem:    Vim9: cannot use imported function with call().
Solution:   Translate the function name. (closes #9590)
diff --git a/src/testdir/test_vim9_import.vim b/src/testdir/test_vim9_import.vim
index 3734709..f06bea2 100644
--- a/src/testdir/test_vim9_import.vim
+++ b/src/testdir/test_vim9_import.vim
@@ -706,7 +706,7 @@
   edit! otherfile
   redraw
 
-  set foldexpr= foldmethod&
+  set foldexpr= foldmethod& debug=
   bwipe!
   delete('Xdir', 'rf')
   &rtp = save_rtp
@@ -1525,6 +1525,8 @@
 
       call another.Getother()
       assert_equal('other', g:result)
+
+      assert_equal('arg', call('another.RetArg', ['arg']))
   END
   CheckScriptSuccess(lines)