Setup a dedicated drupal.org dedicated matrix server

Spin up a dedicated matrix dedicated server for the Drupal community.
We will edit the description of this issue with more details upon discussion on security/authentication/impersonation as settled on the parent ticket https://www.drupal.org/node/2490332 mainly taking into account the closing proposal comment

I propose that we meet on IRC/Matrix channels: https://riot.im/app/#/room/#drupal-bridges:matrix.org & https://riot.im/app/#/room/#drupal-infrastructure:matrix.org and start from here.


Source: https://www.drupal.org/project/issues/rss/infrastructure