Update matrix-registration-bot, improve authentication config (#2723)

* Adjust to new mrb docker versioning

* Stabilze authentication

* fix lint

* Move & document mrb password usage

* Add clean cache role

* Document clean cache

* Fix lint

* Update CHANGELOG.md

* Automate access tokens

* Improve changelog

* Make use of mrb's function to fetch API tokens

* Adjust changelog

* Use ansible.builtin.file to clear directory

* Fix typo

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

roles/custom/matrix-bot-matrix-registration-bot/tasks/validate_config.yml

@@ -5,6 +5,13 @@
     msg: >-
       You need to define a required configuration setting (`{{ item }}`).
   when: "vars[item] == ''"
+  with_items:
+    - "matrix_bot_matrix_registration_bot_bot_password"
+
+- name: (Deprecation) Catch and report old settings
+  ansible.builtin.fail:
+    msg: >-
+      Your configuration contains a variable, which is deprecated - Please check the documentation on how to configure the matrix-registration-bot.
+  when: "item in vars"
   with_items:
     - "matrix_bot_matrix_registration_bot_bot_access_token"
-    - "matrix_bot_matrix_registration_bot_api_token"