
This change remvoes the az filter and always enabled the placement pre-filter. As part of this removal the config option to control enabling the pre-filter is removed as it is now mandatory. The AZ filter docs and tests are also removed and an upgrade release note is added. Depends-On: https://review.opendev.org/c/openstack/devstack/+/886972 Change-Id: Icc8580835beb2b4d40341f81c25eb1f024e70ade