Glob message removal

**Is your feature request related to a problem? Please describe.**

I am moderating a network of room that recently got hit by a spam wave.
Bots will spam the same message over and over and those are tidious to remove (because one bot will join and will post only one message).

**Describe the solution you'd like**

Add a command to redact following a glob like for instance `*spam*` that will delete any message matching that.

**Describe alternatives you've considered**

Word protection can work but useless when you are after the facts.

**Additional context**

No files or tests are named in the issue. Start by tracing existing moderation commands and Matrix redaction handling; clarify the command's glob semantics and define done as deleting every matching message in the requested room.

Written by the indexing model from the issue text.