Drop centos 8 stream testing

In Zed cycle testing runtime, we are targetting the centos 9 stream
- https://governance.openstack.org/tc/reference/runtimes/zed.html

With dropping the python 3.6 support, project started adding python 3.8
as minimum, example nova:
- https://github.com/openstack/nova/blob/56b5aed08c6a3ed81b78dc216f0165ebfe3c3350/setup.cfg#L13

with that, centos 8 stream job is failing 100%
- https://zuul.openstack.org/build/970d029dc96742c3aa0f6932a35e97cf
- https://zuul.openstack.org/builds?job_name=devstack-platform-centos-8-stream&job_name=tempest-full-py3-centos-8-stream&skip=0

This commit drops centos-8-stream testing and move their job definition
to stable/jobs.yaml file as they are being used on stable branch testing.

Change-Id: Ie72eaaf30ee15710f9fec266e93a6c8ad4eb5ddc
diff --git a/zuul.d/stable-jobs.yaml b/zuul.d/stable-jobs.yaml
index 8086458..edee044 100644
--- a/zuul.d/stable-jobs.yaml
+++ b/zuul.d/stable-jobs.yaml
@@ -198,3 +198,41 @@
       - stable/victoria
       - stable/wallaby
       - stable/xena
+
+- job:
+    name: tempest-integrated-compute-centos-8-stream
+    parent: tempest-integrated-compute
+    # TODO(gmann): Make this job non voting until bug#1957941 if fixed.
+    voting: false
+    nodeset: devstack-single-node-centos-8-stream
+    branches:
+      - stable/wallaby
+      - stable/xena
+      - stable/yoga
+    description: |
+      This job runs integration tests for compute. This is
+      subset of 'tempest-full-py3' job and run Nova, Neutron, Cinder (except backup tests)
+      and Glance related tests. This is meant to be run on Nova gate only.
+      This version of the job also uses CentOS 8 stream.
+    vars:
+      # Required until bug/1949606 is resolved when using libvirt and QEMU
+      # >=5.0.0 with a [libvirt]virt_type of qemu (TCG).
+      configure_swap_size: 4096
+
+- job:
+    name: tempest-full-py3-centos-8-stream
+    parent: tempest-full-py3
+    # TODO(gmann): Make this job non voting until bug#1957941 if fixed.
+    voting: false
+    branches:
+      - stable/wallaby
+      - stable/xena
+      - stable/yoga
+    nodeset: devstack-single-node-centos-8-stream
+    description: |
+      Base integration test with Neutron networking and py36 running
+      on CentOS 8 stream
+    vars:
+      # Required until bug/1949606 is resolved when using libvirt and QEMU
+      # >=5.0.0 with a [libvirt]virt_type of qemu (TCG).
+      configure_swap_size: 4096