Release heat RC1 for Antelope

This proposed a RC1 release for heat 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 19.0.0.0rc1..604111b0b
604111b0b Fix setting the tempest virtual env constraints env var
8e2286c9b Fix unit tests for python-barbicanclient 5.5.0
85480f94d Fix an assert statement
29eaf4ef7 Use new get_rpc_client API from oslo.messaging
a0ff4b98b Decode UTF-8 body data in SwiftSignal
1305a3152 Honor 'hidden' parameter in 'stack environment show' command
b452ea708 Skip test_stack_update_with_replacing_userdata
53fa8c374 Explicitly pass error kwarg in nested StackValidationFailed
500201cb7 Skip test_cancel_update_server_with_port
9407b4897 Ignore resource_data decryption errors
ceef7869e Don't load all resources for policy check
5451b9854 Imported Translations from Zanata
0aa0b3825 Update stestr args for inclusive language
56d99bf65 Improve map_merge logging
ddbf9db52 Set cache_ok to avoid further SAWarning
0ea1ee087 Retry to detach volume if nova returned error 409
13fbd367e Fix get_attr syntax in template guide
87bdbfdca Drop implementation for OS::Magnum::Bay/BayModel
ba29a7089 Switch to 2023.1 Python3 unit tests and generic template name
1b42c7296 Update master for stable/zed
af5ffbe01 Replace deprecated Query.as_scalar()
e17f68a83 Deploy healthcheck middleware as app instead of filter
520e2389d Allow deleting user_creds when can't be decrypted

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: I023233da893c04b4891ea38c3aec13ec50155574

deliverables/antelope/heat.yaml

@@ -7,3 +7,11 @@ type: service
 repository-settings:
   openstack/heat:
     tarball-base: openstack-heat
+releases:
+  - version: 20.0.0.0rc1
+    projects:
+      - repo: openstack/heat
+        hash: e582ef5b0b8cdf96e6af2b90b59a2f2b1c0d4ab0
+branches:
+  - name: stable/2023.1
+    location: 20.0.0.0rc1