Regression since ba0a4e864a

A lot of services are yet to be updated to start connecting to
`devture_postgres_container_network` as an additional network.
Many are already done, but I'll go through all the others later.

Putting each client into its own network was good for isolation,
but it's quite wasteful in terms of the container network pool.

This allows us to eliminate the companion and decrease overhead for
simple servers which do not use workers.

This saves up 1 container network and avoids going through extra proxies
unnecessarily.

Downsides: decreasing security slightly due to less networking isolation

Benefits:

- decreased complexity
- having a generically-named `matrix-addons` network we may use for other things now (client apps, etc.)
- not exhausting the container networks pool with 2 (or more) networks and using just 1

This also updates validation tasks and documentation, pointing to
variables in the matrix-synapse role which don't currently exist yet
(e.g. `matrix_synapse_container_labels_client_synapse_admin_api_enabled`).

These variables will be added soon, as Traefik labels are added to the
`matrix-synapse` role. At that point, the `matrix-synapse-reverse-proxy-companion` role
will be updated to also use them.

matrix-nginx-proxy is going away and this is one of the features it
offered.

This feature will have no equivalent in our new Traefik-only
setup, although it's possible to implement it manually by using
`matrix_client_element_container_labels_additional_labels`

This is completely untested.

This is still very far from usable.

Various bridges and bots are still talking to
`matrix-nginx-proxy` instead of the new `matrix-homeserver-proxy` role.
These services need to be reworked. While reworking them,
various cleanups are being done as well as adding Traefik-labels to
those that need them.

`matrix_media_repo_identifier` is already defined in the role defaults,
which is a better role to have it anyway.

It seems like connectivity is problematic, even though the networks
appear to be configured correctly:

> [ioredis] Unhandled error event: Error: connect ECONNREFUSED 172.22.0.2:6739
> at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1595:16)

For now, I disable pointing the queue host to Redis to avoid it.
It should be investigated.

People who enable Hookshot's new experimental encryption may encounter
this also.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3042

Squashed based on the work done in https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3042

commit 49932b8f3c
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:21:31 2023 +0200

    Fix syntax in matrix-bridge-hookshot/tasks/reset_encryption.yml

    Also, this task always does work and side-effects, so it should always report changes
    (`changed_when: true`).

commit 6bdf7a9dcb
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:12:41 2023 +0200

    Add Hookshot validation task to ensure queue settings are set when encryption is enabled

commit 8c531b7971
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:10:17 2023 +0200

    Add missing variables rewiring in group_vars/matrix_servers for Hookshot

commit 7d26dabc2f
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:08:19 2023 +0200

    Add defaults for matrix_hookshot_queue_host and matrix_hookshot_queue_port

commit 74f91138c9
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:06:17 2023 +0200

    Fix syntax for connecting to additional networks for Hookshot

commit ca7b41f3f2
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:05:28 2023 +0200

    Fix indentation and remove unnecessary if-statements

commit ac4a918d58
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:04:44 2023 +0200

    Add missing --network for Hookshot

    This seems to have been removed by accident.

commit 6a81fa208f
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:02:47 2023 +0200

    Make automatic Redis enabling safer, when Hookshot encryption enabled

    If we ever default encryption to enabled for Hookshot, we only wish to force-enable Redis if Hookshot is actually enabled.

commit 75a8e0f2a6
Author: Slavi Pantaleev <slavi@devture.com>
Date:   Sat Dec 16 09:01:10 2023 +0200

    Fix typo

commit 98ad182eac
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:37:40 2023 +0100

    Add defaults for Hookshot's encryption

commit 29fa9fab15
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:35:11 2023 +0100

    Improve wording of Hookshot's encryption section

commit 4f835e0560
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:28:52 2023 +0100

    use safer mount options for the container's files

commit 8c93327e25
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:26:01 2023 +0100

    fix filename

commit 03a7bb6e77
Merge: e55d7694 06047763
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:23:44 2023 +0100

    Merge branch 'HarHarLinks/hookshot-encryption' of https://github.com/real-joshua/matrix-docker-ansible-deploy into HarHarLinks/hookshot-encryption

commit 06047763bb
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:15:54 2023 +0100

    Update roles/custom/matrix-bridge-hookshot/templates/config.yml.j2

    change the if statement to not require a variable with a length > 0 and add a filter to json for the redis host

    Co-authored-by: Slavi Pantaleev <slavi@devture.com>

commit e55d769465
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:13:50 2023 +0100

    clarify that Redis is required, standardadise on Hookshot with an upper-case first letter for consistency

commit 66706e4535
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 22:08:20 2023 +0100

    Update roles/custom/matrix-bridge-hookshot/templates/config.yml.j2

    fix for a typo

    Co-authored-by: Slavi Pantaleev <slavi@devture.com>

commit f6aaeb9a16
Merge: e5d34002 869dd33f
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 00:22:34 2023 +0100

    Merge branch 'master' into HarHarLinks/hookshot-encryption

commit e5d34002fd
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Fri Dec 15 00:09:27 2023 +0100

    Add Jinja loop to allow adding multiple networks

commit 69f947782d
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Thu Dec 14 23:52:41 2023 +0100

    split if statements for the message queue and experimental encryption support into seperate statements

commit 4c13be1c89
Author: Joshua Hoffmann <joshua.hoffmann@b1-systems.de>
Date:   Thu Dec 14 23:31:19 2023 +0100

    change variable name per spantaleev's suggestion (https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2979#discussion_r1379015551)

commit 9905309aa9
Author: HarHarLinks <kim.brose@rwth-aachen.de>
Date:   Wed Nov 1 16:14:04 2023 +0100

    amend docs

commit 94abf2d5bd
Author: HarHarLinks <kim.brose@rwth-aachen.de>
Date:   Wed Nov 1 16:05:22 2023 +0100

    draft encryption support for hookshot

Related to e3375d56f3

Currently v3.0.0 tested with no issues.
So remove matrix_user_verification_service_docker_image from groups_vars.

/.npm must be writable or an error will be reported.