Rework all roles to include component_(docker|container)_image_registry_prefix* variables

This:

- brings consistency - no more mixing `_name_prefix` and `_registry_prefix`
- adds extensibility - a future patch will allow reconfiguring all registry prefixes for all roles in the playbook

We still have `_docker_` vs `_container_` inconsistencies.
These may be worked on later.

roles/custom/matrix-bridge-mx-puppet-twitter/tasks/validate_config.yml

@@ -1,5 +1,5 @@
 # SPDX-FileCopyrightText: 2020 Tulir Asokan
-# SPDX-FileCopyrightText: 2022 - 2024 Slavi Pantaleev
+# SPDX-FileCopyrightText: 2022 - 2025 Slavi Pantaleev
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
@@ -28,3 +28,4 @@
   with_items:
     - {'old': 'matrix_mx_puppet_twitter_webhook_path', 'new': '<matrix_mx_puppet_twitter_server_path, but setting matrix_mx_puppet_twitter_path_prefix is better'}
     - {'old': 'matrix_mx_puppet_twitter_webhook_url', 'new': 'matrix_mx_puppet_twitter_server_url, but controlling matrix_mx_puppet_twitter_scheme/matrix_mx_puppet_twitter_hostname/matrix_mx_puppet_twitter_path_prefix is better'}
+    - {'old': 'matrix_mx_puppet_twitter_docker_image_name_prefix', 'new': 'matrix_mx_puppet_twitter_docker_image_registry_prefix'}