Release Octavia RC2 for Antelope

This RC2 contains a workaround for a bug in openstacksdk [0].
As this bug may break octavia-dashboard in Antelope, we choose to apply
a workaround in Octavia.

[0] https://review.opendev.org/c/openstack/openstacksdk/+/876669

$ git log --oneline --no-merges 12.0.0.0rc1..4486d24
4486d241 Workaround an openstacksdk bug
d5013bf4 Update TOX_CONSTRAINTS_FILE for stable/2023.1
b5267f74 Update .gitreview for stable/2023.1

Change-Id: I4bd59d4cfdb8a36252ddbf864154ec57f1175ea1

deliverables/antelope/octavia.yaml

@@ -12,6 +12,10 @@ releases:
     projects:
       - repo: openstack/octavia
         hash: 8f4cde3666d9b31f9d5e15194fde13f6b65de070
+  - version: 12.0.0.0rc2
+    projects:
+      - repo: openstack/octavia
+        hash: 4486d2416f600df15df1b5c98a676f898e2b1d42
 branches:
   - name: stable/2023.1
     location: 12.0.0.0rc1