bug#30073: 27.0.50; dired-do-delete ignores customization for short answers

[Juri Linkov]

I customized ‘yes-or-no-p’ in ~/.emacs to short answers:

  (fset 'yes-or-no-p 'y-or-n-p)

but now ‘dired-do-delete’ ignores this customization, and always requires
typing a full answer “yes” with RET when deleting recursively all subdirs,
instead of accepting just a single letter ‘y’ as before the recent change.

I think in this case better is to accept ‘y’ for “yes”, and ‘!’ for “all”
like in ‘query-replace-map’.