Add API microversions support in Karbor

[chenying]

We need a way to be able to introduce changes to the REST API to both fix bugs and add new features. Some of these changes are backwards incompatible and we currently have no way of doing this. This becomes especially important to introduce backwards incompatible changes to the REST API.
Lots of project like nova, cinder, manial[1] have introduced API microversions. The API microversions will also be introduced to Karbor.

[1] https://developer.openstack.org/api-guide/compute/microversions.html

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Ghanshyam <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/karbor/+/499465
Reason: karbor is retired now http://lists.openstack.org/pipermail/openstack-discuss/2020-November/018643.html