Move roles/matrix* to roles/custom/matrix*

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.

roles/custom/matrix-ldap-registration-proxy/tasks/setup_install.yml

@@ -0,0 +1,63 @@
+---
+
+- name: Ensure matrix_ldap_registration_proxy paths exist
+  ansible.builtin.file:
+    path: "{{ item.path }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - {path: "{{ matrix_ldap_registration_proxy_config_path }}", when: true}
+    - {path: "{{ matrix_ldap_registration_proxy_docker_src_files_path }}", when: true}
+  when: "item.when | bool"
+
+- ansible.builtin.set_fact:
+    matrix_ldap_registration_proxy_requires_restart: false
+
+- name: Ensure matrix_ldap_registration_proxy repository is present on self-build
+  ansible.builtin.git:
+    repo: "{{ matrix_ldap_registration_proxy_container_image_self_build_repo }}"
+    dest: "{{ matrix_ldap_registration_proxy_docker_src_files_path }}"
+    version: "{{ matrix_ldap_registration_proxy_container_image_self_build_branch }}"
+    force: "yes"
+  become: true
+  become_user: "{{ matrix_user_username }}"
+  register: matrix_ldap_registration_proxy_git_pull_results
+
+- name: Ensure matrix_ldap_registration_proxy Docker image is built
+  community.docker.docker_image:
+    name: "{{ matrix_ldap_registration_proxy_docker_image }}"
+    source: build
+    force_source: "{{ matrix_ldap_registration_proxy_git_pull_results.changed }}"
+    build:
+      dockerfile: Dockerfile
+      path: "{{ matrix_ldap_registration_proxy_docker_src_files_path }}"
+      pull: true
+  when: true
+
+- name: Ensure matrix_ldap_registration_proxy config installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/ldap-registration-proxy.env.j2"
+    dest: "{{ matrix_ldap_registration_proxy_config_path }}/ldap-registration-proxy.env"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+
+- name: Ensure matrix-ldap-registration-proxy.service installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/systemd/matrix-ldap-registration-proxy.service.j2"
+    dest: "{{ matrix_systemd_path }}/matrix-ldap-registration-proxy.service"
+    mode: 0644
+  register: matrix_ldap_registration_proxy_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-ldap-registration-proxy.service installation
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_ldap_registration_proxy_systemd_service_result.changed | bool"
+
+- name: Ensure matrix-ldap-registration-proxy.service restarted, if necessary
+  ansible.builtin.service:
+    name: "matrix-ldap-registration-proxy.service"
+    state: restarted
+  when: "matrix_ldap_registration_proxy_requires_restart | bool"