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.

**Warning**: [CI pipeline is in progress](https://gitlab.com/etke.cc/honoroit/-/pipelines/1165360868)

changelog:

* safer reaction forwarding
* fix duplicated prefix and suffix on completed requests
* add missing `!ho help` entries
* add new `!ho count` command
* count requests by homeserver and by MXID
* add new `!ho config` command set - configure honoroit directly from the chat
* mautrix-go 0.15.x+ migration
* shared secret auth support
* account data encyption support

removed env vars (automatic migration):

* HONOROIT_TEXT_*
* HONOROIT_ALLOWEDUSERS
* HONOROIT_IGNOREDROOMS
* HONOROIT_IGNORENOTHREAD
* HONOROIT_NOENCRYPTION

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).

It only serves a metrics endpoint, so it shouldn't try to capture
anything else.

* healthchecks.io integration
* mutex on forwarding messages into thread
* fix in prefixes handling
* send error messages as thread reply when possible

This paves the way for installing other roles into `roles/galaxy` using `ansible-galaxy`,
similar to how it's done in:

- https://github.com/spantaleev/gitea-docker-ansible-deploy
- https://github.com/spantaleev/nextcloud-docker-ansible-deploy

In the near future, we'll be removing a lot of the shared role code from here
and using upstream roles for it. Some of the core `matrix-*` roles have
already been extracted out into other reusable roles:

- https://github.com/devture/com.devture.ansible.role.postgres
- https://github.com/devture/com.devture.ansible.role.systemd_docker_base
- https://github.com/devture/com.devture.ansible.role.timesync
- https://github.com/devture/com.devture.ansible.role.vars_preserver
- https://github.com/devture/com.devture.ansible.role.playbook_runtime_messages
- https://github.com/devture/com.devture.ansible.role.playbook_help

We just need to migrate to those.