gpg: Do not delete any keys if --dry-run is passed.
* g10/delkey.c (do_delete_key): Don't delete the keyblock on dry runs. Do not clear the ownertrust. Do not let the agent delete the key.
- Co-authored-by: Matheus Afonso Martins Moreira
- Signed-off-by: Werner Koch <wk@gnupg.org>