[nova] Create 2024.1 branch for client and non-client libs

This creates the stable/2024.1 branch for all client and non-client
libraries now that we are past the library freeze.

If the team wants to wait for a specific patch to make it to the
library (for example if the gate of the deliverable is broken and
needs to be fixed before branching), then someone from the team can
-1 the patch to have it held, or update that patch with a different
commit SHA.

Patches with no response will be merged by Friday, 08.

Change-Id: I624860e50c0fb1e6c893f96421a3fddd02edeb96

deliverables/caracal/os-vif.yaml

@@ -20,3 +20,6 @@ releases:
     projects:
       - repo: openstack/os-vif
         hash: 2f53c930f9fe857f4d15549b28ec74120d579f79
+branches:
+  - name: stable/2024.1
+    location: 3.5.0

deliverables/caracal/osc-placement.yaml

@@ -11,3 +11,6 @@ releases:
     projects:
       - repo: openstack/osc-placement
         hash: e6c1acf84120ae97da0f6ba796344749b0605ebf
+branches:
+  - name: stable/2024.1
+    location: 4.3.0

deliverables/caracal/python-novaclient.yaml

@@ -15,3 +15,6 @@ releases:
     projects:
       - repo: openstack/python-novaclient
         hash: 533d5df5168123578da5eb5380efb64096aa3c43
+branches:
+  - name: stable/2024.1
+    location: 18.6.0