Closes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3538

See: https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3538#issuecomment-2405780285

We'be already been going against upstream defaults and have been
enabling backfilling for a few other bridges (Messenger, Instagram, Telegram, Twitter).

Now I'm enabling backfilling by default for the remaining ones, for
consistency.

Related to:
- https://github.com/mautrix/gmessages/releases/tag/v0.5.0
- https://mau.fi/blog/2024-09-mautrix-release/

It seems like the new version does not support a `/metrics` endpoint.
We skip keep the Ansible variables, but they're not doing anything.

Shared Secret Auth double puppeting still works for this bridge, but
is deprecated and will go away in the future.

Related to 0241c71a4c

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3270#issuecomment-2143782962

With this change, it should be possible for people to adjust the Docker
dependency from `docker.service` to something else (e.g. `pkg-ContainerManager-dockerd.service`),
or to completely eliminate it by setting `devture_systemd_docker_base_docker_service_name` to an empty string.

This makes it easier for people to use the playbook against a Synology DSM server.

Signed-off-by: gardar <gardar@users.noreply.github.com>

This is backward-compatible with what we had before. We're not changing
the SSL mode - just making it configurable.

Most components are defaulting to `sslmode=disable`, while some
(`matrix-bot-matrix-reminder-bot` and others) do not specify an `sslmode` at all.

We're making sslmode configurable, because certain external Postgres
servers may be configured to require SSL encryption.
In such cases `sslmode=disable` does not work and needs to be changed to
`sslmode=require` or something else (`verify-ca`, `verify-full`, etc).

Related to https://github.com/mautrix/gmessages/releases/tag/v0.1.0

* intial commit

* changed

* Reorderd

* merge old changes

* added changes to matrix_servers

* Remove duplicate discord

* Update main.yml

* added google message to configuring-playbook.md

* Changed docs to add new changes

* Changed bug?

* Removed problem j2 values

* Rename a service files

* change how password hash string

* Changed port number

* Change how the local part works

* Revert "Merge pull request #8 from shreyasajj/wsproxy"

This reverts commit bb1b8fc67ca39f63ca77e70077be99cb2b32c4de, reversing
changes made to cce6ba5f9d.

---------

Co-authored-by: Shreyas Ajjarapu <github.tzarina@aleeas.com>