Fix openEuler support

openEuler 22.03 LTS support was removed from devstack in last
few months due to its libvirt version is too old and the CI job
always fail.

This Patch add a yum repository for libvirt7.2.0, and add the
related CI job to make sure its works well.

Change-Id: Ic507f165cfa117451283360854c4776a968bbb10
2 files changed