Pass a call to host an XMPP server for Tails support

We will ask someone else to host and maintain an XMPP server for us.

Our sysadmin team cannot deal with this atm, so we need a collective that hosts and maintain it for us, someone we trust will not use the metadata gathered from users.

Related issues

Blocked by #11307
Blocked by #11701 (closed)
Blocked by #11702 (closed)

Original created by @emmapeel on 11317 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information