Always uninstall matrix-nginx-proxy, if discovered

This changes the behavior of
`matrix_playbook_migration_matrix_nginx_proxy_uninstallation_enabled`
and is against what we initially described in the changelog entry,
but I've discovered some problems when the `matrix-nginx-proxy` service
and container remain running. They need to go.

roles/custom/matrix_playbook_migration/tasks/main.yml

@@ -33,8 +33,7 @@
   block:
     - ansible.builtin.include_tasks: "{{ role_path }}/tasks/cleanup_matrix_static_files_well_known.yml"
 
-- when: matrix_playbook_migration_matrix_nginx_proxy_uninstallation_enabled | bool
-  tags:
+- tags:
     - setup-all
     - install-all
   block:

roles/custom/matrix_playbook_migration/tasks/uninstall_matrix_nginx_proxy.yml

@@ -19,7 +19,8 @@
         path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-nginx-proxy.service"
         state: absent
 
-    - name: Ensure matrix-proxy-files files are deleted
-      ansible.builtin.file:
-        path: "{{ matrix_base_data_path }}/nginx-proxy"
-        state: absent
+- when: matrix_playbook_migration_matrix_nginx_proxy_uninstallation_enabled | bool
+  name: Ensure matrix-proxy-files files are deleted
+  ansible.builtin.file:
+    path: "{{ matrix_base_data_path }}/nginx-proxy"
+    state: absent