Add option to enable swift object versioning

[Diko Parvanov]

As described, add a feature to the charm to enable swift versioning for objects

https://docs.ceph.com/en/latest/radosgw/swift/containerops/#enable-object-versioning-for-a-container

rgw swift versioning enabled = true

[Liam Young (gnuoy)]

Seems like a sensible addition to me. More info on object versioning here: https://docs.openstack.org/swift/latest/api/object_versioning.html

[Garrett Neugent (thogarre)]

A review has been submitted - https://review.opendev.org/c/openstack/charm-ceph-radosgw/+/770876

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-ceph-radosgw/+/770876
Committed: https://opendev.org/openstack/charm-ceph-radosgw/commit/72a7184dc5b14bd6c1eb6690406ae24a76c809d0
Submitter: "Zuul (22348)"
Branch: master

commit 72a7184dc5b14bd6c1eb6690406ae24a76c809d0
Author: Jarred Wilson <email address hidden>
Date: Thu Jan 14 14:07:07 2021 -0500

    Enable object versioning for a container

    This patch adds the config option rgw-swift-versioning-enabled boolean that enables swift versioning for the ceph-backed storage solution. This uses X-Versions-Location as it is the only header that radosgw interprets.

    closes-bug: #1910679
    Change-Id: I5b42c34882b46e96f4cc92d91ec441a4bdfd76f6