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-base/tasks/util/ensure_fuse_installed.yml

@@ -0,0 +1,23 @@
+---
+# This is for both RedHat 7 and 8
+- name: Ensure fuse installed (RedHat)
+  ansible.builtin.yum:
+    name:
+      - fuse
+    state: present
+  when: ansible_os_family == 'RedHat'
+
+# This is for both Debian and Raspbian
+- name: Ensure fuse installed (Debian/Raspbian)
+  ansible.builtin.apt:
+    name:
+      - fuse
+    state: present
+  when: ansible_os_family == 'Debian'
+
+- name: Ensure fuse installed (Archlinux)
+  community.general.pacman:
+    name:
+      - fuse3
+    state: present
+  when: ansible_distribution == 'Archlinux'

roles/custom/matrix-base/tasks/util/ensure_openssl_installed.yml

@@ -0,0 +1,23 @@
+---
+# This is for both RedHat 7 and 8
+- name: Ensure openssl installed (RedHat)
+  ansible.builtin.yum:
+    name:
+      - openssl
+    state: present
+  when: ansible_os_family == 'RedHat'
+
+# This is for both Debian and Raspbian
+- name: Ensure openssl installed (Debian/Raspbian)
+  ansible.builtin.apt:
+    name:
+      - openssl
+    state: present
+  when: ansible_os_family == 'Debian'
+
+- name: Ensure openssl installed (Archlinux)
+  community.general.pacman:
+    name:
+      - openssl
+    state: present
+  when: ansible_distribution == 'Archlinux'