I had implemented the renaming for `StickerSet only`

other tests are probably failing not due to me
having changed something...

* add aliases to support calls to old methods
* issue deprecation warning if an old method is called
* WEIRD ERROR in `test_sticker_set_to_dict()`
  (see my TODO note there)

* add aliases to support calls to old methods
* issue deprecation warning if an old method is called
* WEIRD ERROR in `test_sticker_set_to_dict()`
  (see my TODO note there)

the method will be removed anyway, no need to add
new parameter to it.

the tests were passing because Bot API still supports
the old method

Co-authored-by: Harshil <37377066+harshil21@users.noreply.github.com>