[cinder] critical os-brick fix needs immediate review

Gorka has a patch up to address a possible data loss situation: https://review.opendev.org/c/openstack/os-brick/+/782992 I spoke with the release team today, and if we can get the patch reviewed and merged to master and then backported to stable/wallaby by MONDAY (29 March), we can apply for a Requirements Freeze Exception so that os-brick with this fix will be included in the OpenStack coordinated wallaby release. (It's a data loss issue, of course we want the fix in the wallaby release.) So please review at your earliest convenience. thanks, brian