Release sahara-extra RC1 for Antelope

This proposed a RC1 release for sahara-extra to get any merged changes
out prior to the RC1 deadline for Antelope going into effect.

If the team is ready to proceed, please leave a +1 to acknowledge this
release and we will process right away. If the team is working on any
final merges, leave a -1 with some detail on the status and update the
patch with the new commit hash to use when ready.

Patches with no response will be merged by early Friday, March 03.

$ git log --oneline --no-merges wallaby-em..cf57628

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: Ifd59c5018487dbca214b58016f9f5e26eb544981

deliverables/antelope/sahara-extra.yaml

@@ -5,3 +5,11 @@ team: sahara
 type: other
 repository-settings:
   openstack/sahara-extra: {}
+releases:
+  - version: 17.0.0.0rc1
+    projects:
+      - repo: openstack/sahara-extra
+        hash: cf5762829e5ac2f348d793f950f72dc234ce785e
+branches:
+  - name: stable/2023.1
+    location: 17.0.0.0rc1