W,V,U,T branch for devstack-plugin-ceph

The plugin has just become branched [1] which means its
current master is compatible with all currently supported
releases.

This patch creates a branch for every supported release,
which was also discussed and agreed on IRC [2].

[1] https://review.opendev.org/c/openstack/governance/+/786067
[2] http://eavesdrop.openstack.org/irclogs/%23openstack-qa/%23openstack-qa.2021-04-13.log.html#t2021-04-13T17:39:40

Change-Id: Icf74f6b759f497c7672c1b642540d14e3340936b

deliverables/train/devstack-plugin-ceph.yaml

@@ -0,0 +1,12 @@
+---
+launchpad: devstack
+release-model: untagged
+team: Quality Assurance
+type: other
+stable-branch-type: tagless
+branches:
+  - location:
+      openstack/devstack-plugin-ceph: c55c49121acdb38a0d8d4a7ee6a89c9dec37507a
+    name: stable/train
+repository-settings:
+  openstack/devstack-plugin-ceph: {}

deliverables/ussuri/devstack-plugin-ceph.yaml

@@ -0,0 +1,12 @@
+---
+launchpad: devstack
+release-model: untagged
+team: Quality Assurance
+type: other
+stable-branch-type: tagless
+branches:
+  - location:
+      openstack/devstack-plugin-ceph: c55c49121acdb38a0d8d4a7ee6a89c9dec37507a
+    name: stable/ussuri
+repository-settings:
+  openstack/devstack-plugin-ceph: {}

deliverables/victoria/devstack-plugin-ceph.yaml

@@ -0,0 +1,12 @@
+---
+launchpad: devstack
+release-model: untagged
+team: Quality Assurance
+type: other
+stable-branch-type: tagless
+branches:
+  - location:
+      openstack/devstack-plugin-ceph: c55c49121acdb38a0d8d4a7ee6a89c9dec37507a
+    name: stable/victoria
+repository-settings:
+  openstack/devstack-plugin-ceph: {}

deliverables/wallaby/devstack-plugin-ceph.yaml

@@ -0,0 +1,12 @@
+---
+launchpad: devstack
+release-model: untagged
+team: Quality Assurance
+type: other
+stable-branch-type: tagless
+branches:
+  - location:
+      openstack/devstack-plugin-ceph: c55c49121acdb38a0d8d4a7ee6a89c9dec37507a
+    name: stable/wallaby
+repository-settings:
+  openstack/devstack-plugin-ceph: {}