Fix openEuler support

openEuler 22.03 LTS support was removed from devstack in last
few months due to its libvirt version is too old and the CI job
always fail.

This Patch add a yum repository for libvirt7.2.0, and add the
related CI job to make sure its works well.

Change-Id: Ic507f165cfa117451283360854c4776a968bbb10

.zuul.yaml

@@ -934,6 +934,8 @@
         - devstack-platform-rocky-blue-onyx
         - devstack-platform-ubuntu-jammy-ovn-source
         - devstack-platform-ubuntu-jammy-ovs
+        - devstack-platform-openEuler-22.03-ovn-source
+        - devstack-platform-openEuler-22.03-ovs
         - devstack-multinode
         - devstack-unit-tests
         - openstack-tox-bashate

stack.sh

@@ -421,8 +421,12 @@ elif [[ $DISTRO == "openEuler-22.03" ]]; then
     # 1. the hostname package is not installed by default
     # 2. Some necessary packages are in openstack repo, for example liberasurecode-devel
     # 3. python3-pip can be uninstalled by `get_pip.py` automaticly.
-    install_package hostname openstack-release-wallaby
+    # 4. Ensure wget installation before use
+    install_package hostname openstack-release-wallaby wget
     uninstall_package python3-pip
+
+    # Add yum repository for libvirt7.X
+    sudo wget https://eur.openeuler.openatom.cn/coprs/g/sig-openstack/Libvirt-7.X/repo/openeuler-22.03_LTS/group_sig-openstack-Libvirt-7.X-openeuler-22.03_LTS.repo -O /etc/yum.repos.d/libvirt7.2.0.repo
 fi
 
 # Ensure python is installed