Stable victoria is in Extended maintenance state[1] and we need to pin tempest in stable/victoria testing. We use Tempest 26.1.0 because of oslo.utils version bump in Tempest 27.0.0 and 28.0.0 which is not compatible with stable/victoria upper constraints so these versions do not work in stable/victoria. Tempest 26.1.0 version is compatible for victoria testing from tempest side as well as from upper constraints side. Depends-On: https://review.opendev.org/c/openstack/tempest/+/843293 Depends-On: https://review.opendev.org/c/openstack/devstack-plugin-ceph/+/843354 Change-Id: I3f6c3914d0a35155dc27bbaf6e8db92b856a4f1f