Add the ability to delete the system message about joining a group

[umputun]

Discussed in #91

^{Originally posted by fear-rus June 3, 2024}
I suggest adding the ability to delete the system message about joining the group after deleting the message and banning the user. When there is a lot of spam, and the bot deletes it, then there are system messages about joining, which look like spam pages in the group. Is it possible to automatically delete messages about joining a group of spambots that have been deleted?