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-mautrix-slack/defaults/main.yml

@@ -11,8 +11,10 @@ matrix_mautrix_slack_container_image_self_build_branch: "{{ 'main' if matrix_mau
 # renovate: datasource=docker depName=dock.mau.dev/mautrix/slack
 matrix_mautrix_slack_version: v0.1.4
 # See: https://mau.dev/mautrix/slack/container_registry
-matrix_mautrix_slack_docker_image: "{{ matrix_mautrix_slack_docker_image_name_prefix }}mautrix/slack:{{ matrix_mautrix_slack_version }}"
-matrix_mautrix_slack_docker_image_name_prefix: "{{ 'localhost/' if matrix_mautrix_slack_container_image_self_build else 'dock.mau.dev/' }}"
+matrix_mautrix_slack_docker_image: "{{ matrix_mautrix_slack_docker_image_registry_prefix }}mautrix/slack:{{ matrix_mautrix_slack_version }}"
+matrix_mautrix_slack_docker_image_registry_prefix: "{{ 'localhost/' if matrix_mautrix_slack_container_image_self_build else matrix_mautrix_slack_docker_image_registry_prefix_upstream }}"
+matrix_mautrix_slack_docker_image_registry_prefix_upstream: "{{ matrix_mautrix_slack_docker_image_registry_prefix_upstream_default }}"
+matrix_mautrix_slack_docker_image_registry_prefix_upstream_default: "dock.mau.dev/"
 matrix_mautrix_slack_docker_image_force_pull: "{{ matrix_mautrix_slack_docker_image.endswith(':latest') }}"
 
 matrix_mautrix_slack_base_path: "{{ matrix_base_data_path }}/mautrix-slack"

roles/custom/matrix-bridge-mautrix-slack/tasks/validate_config.yml

@@ -21,7 +21,7 @@
       Consider either changing `matrix_mautrix_slack_appservice_bot_username` (the bot username for the mautrix-slack component) or `matrix_appservice_slack_bot_name` (the bot username for the appservice-slack component).
       We recommend that you change the username for the newly-added (and yet unused) component.
 
-- name: (Deprecation) Catch and report renamed settings
+- name: (Deprecation) Catch and report renamed mautrix-slack variables
   ansible.builtin.fail:
     msg: >-
       Your configuration contains a variable, which now has a different name.
@@ -31,3 +31,4 @@
     - {'old': 'matrix_mautrix_slack_login_shared_secret', 'new': '<removed>'}
     - {'old': 'matrix_mautrix_slack_bridge_login_shared_secret_map', 'new': '<superseded by matrix_mautrix_slack_double_puppet_secrets>'}
     - {'old': 'matrix_mautrix_slack_bridge_double_puppet_server_map', 'new': '<removed>'}
+    - {'old': 'matrix_mautrix_slack_docker_image_name_prefix', 'new': 'matrix_mautrix_slack_docker_image_registry_prefix'}