Co-Authored-By: Slavi Pantaleev <slavi@devture.com>

* Allow the mautrix whatsapp relaybot to be enable with a variable

This allows a user to enable the relaybot by setting a variable in
`vars.yml` in the same way that the mautrix signal relaybot is
configured.

* Correct default values for mautrix whatsapp relaybot variables

* Add documentation for using the relaybot with mautrix whatsapp

* Adjust variable names to better reflect what they do

* Set default variables properly and use to_json in template

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2369

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2363

Fixes the following issue when trying to use the !pm <phone number> command: https://gitlab.com/signald/signald/-/issues/345

Conduit update 0.5.0 fixed the issue, so this is no longer needed.

Related to:

- https://github.com/matrix-org/synapse/pull/14551/files
- https://github.com/matrix-org/synapse/pull/14619/files

Signed-off-by: Joe Kappus <joe@wt.gd>

Please note that This Mjolnir version bump technnically is missing some extra stuff that mjolnir claims we should do but it didnt work when i tried it and well my mjolnir deployment has been running this since release day almost and its fine. No errors in log that are unexpected. (Mjolnir throws errors in the log for anyone who wonders for various things that are fine. Like if a protection is off that is an error. Its due to how matrix-bot-lib works.)

Untested