Allow disabled federation presence, both receiving and sending

[realtyem]

This should allow for not processing presence received over federation and also not sending it out over federation.

I have tests written for the room joining cases, I'm still working on the regular send and receive cases.

Set in your shared configuration:

presence:
  enabled: true
  disable_federation_presence: true

An oddity I noticed while writing some of the tests, we are queueing up presence states to send out over federation for ourselves, but they are filtered out at the federation sender level. Since that is extra traffic that goes over replication, I'll probably rip that out later on. But in the mean time, I left a comment in the one test where it'll need to be switched over to match that behavior.

Pull Request Checklist

• Pull request is based on the develop branch
• Pull request includes a changelog file.
• Pull request includes a sign off
• Code style is correct
  (run the linters)

Signed-off-by: Jason Little realtyem@gmail.com

[clokep]

See also #8055.

[realtyem]

See also #8055.

Noted. Looks like a nice addon to do the next go around(unless you think it's worth the time of dealing with it now?)