Check directory in Tramp's {copy,rename}-file

Check directory in Tramp's {copy,rename}-file

* lisp/net/tramp-adb.el (tramp-adb-handle-copy-file)
(tramp-adb-handle-rename-file):
* lisp/net/tramp-gvfs.el (tramp-gvfs-do-copy-or-rename-file):
* lisp/net/tramp-rclone.el (tramp-rclone-do-copy-or-rename-file):
* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file):
* lisp/net/tramp-smb.el (tramp-smb-handle-copy-file)
(tramp-smb-handle-rename-file):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-do-copy-or-rename-file):
Check, that NEWNAME is not a directory given as file name.

* test/lisp/net/tramp-tests.el (tramp-test11-copy-file)
(tramp-test12-rename-file): Extend tests.