Add periodic job with volume pool metrics tests

[vyzigold]

To check volume pool metrics, we need a correct environment configured with a storage backend - in this case ceph. The job takes abet 20 minutes longer than our usual jobs, so it was decided to run it as part of the periodic pipeline instead of running it with each PR in the check pipeline.

Depends-On: openstack-k8s-operators/telemetry-operator#693

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/70420d68a028439897f9ab74ea8ed169

✔️ feature-verification-tests-noop SUCCESS in 6s
✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 12m 04s
✔️ functional-autoscaling-tests-osp18 SUCCESS in 1h 39m 08s
✔️ functional-logging-tests-osp18 SUCCESS in 1h 07m 52s
❌ functional-graphing-tests-osp18 FAILURE in 1h 06m 58s (non-voting)
❌ functional-periodic-telemetry-with-ceph FAILURE in 1h 51m 52s

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/fd688579f3a2497dbb6333f227401d6b

✔️ feature-verification-tests-noop SUCCESS in 6s
✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 46m 09s
✔️ functional-autoscaling-tests-osp18 SUCCESS in 1h 37m 12s
✔️ functional-logging-tests-osp18 SUCCESS in 1h 08m 54s
❌ functional-graphing-tests-osp18 FAILURE in 1h 10m 24s (non-voting)
❌ functional-periodic-telemetry-with-ceph FAILURE in 2h 26m 34s

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/6d438bd9546c41e39f836144bb7d3aaf

✔️ feature-verification-tests-noop SUCCESS in 6s
✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 44m 47s
✔️ functional-autoscaling-tests-osp18 SUCCESS in 1h 45m 51s
✔️ functional-logging-tests-osp18 SUCCESS in 1h 08m 04s
❌ functional-graphing-tests-osp18 FAILURE in 1h 08m 38s (non-voting)
❌ functional-periodic-telemetry-with-ceph FAILURE in 2h 23m 20s