Add type support to matrix_coturn_container_additional_volumes

.. and try to auto-switch between `bind` and `volume` depending on
whether there's a slash in the `src` path.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2482

roles/custom/matrix-coturn/templates/systemd/matrix-coturn.service.j2

@@ -35,7 +35,7 @@ ExecStart={{ devture_systemd_docker_base_host_command_docker }} run --rm --name
 			{% endif %}
 			--mount type=bind,src={{ matrix_coturn_config_path }},dst=/turnserver.conf,ro \
 			{% for volume in matrix_coturn_container_additional_volumes %}
-			--mount type=bind,src={{ volume.src }},dst={{ volume.dst }}{{ (',' + volume.options) if volume.options else '' }} \
+			--mount type={{ volume.type | default('bind' if '/' in volume.src else 'volume') }},src={{ volume.src }},dst={{ volume.dst }}{{ (',' + volume.options) if volume.options else '' }} \
 			{% endfor %}
 			{% for arg in matrix_coturn_container_extra_arguments %}
 			{{ arg }} \