Support using SSL on worker endpoints. (#14128)

* Fix missing SSL support in worker endpoints.

* Add changelog

* SSL for Replication endpoint

* Remove unit test change

* Refactor listener creation to reduce duplicated code

* Fix the logger message

* Update synapse/app/_base.py

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Update synapse/app/_base.py

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Update synapse/app/_base.py

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Add config documentation for new TLS option

Co-authored-by: Tuomas Ojamies <tojamies@palantir.com>
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
Co-authored-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>