Update container-image-build workflow

Image builds were previously failing due to the runners being
provisioned with CS8 (Zed requires python > 3.6 which CS8 does not
support). This change edits the workflow to use new RL9 images, which
can build Zed container images.

The workflow also had some CS8-specific customisations which have been
removed

Author: Alex-Welsh

.github/workflows/stackhpc-container-image-build.yml

@@ -40,7 +40,7 @@ jobs:
   generate-tag:
     name: Generate container image tag
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
-    runs-on: [self-hosted, stackhpc-kayobe-config-kolla-builder]
+    runs-on: [self-hosted, stackhpc-kayobe-config-kolla-builder-rl9]
     permissions: {}
     outputs:
       datetime_tag: ${{ steps.datetime_tag.outputs.datetime_tag }}
@@ -88,7 +88,7 @@ jobs:
   container-image-build:
     name: Build Kolla container images
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
-    runs-on: [self-hosted, stackhpc-kayobe-config-kolla-builder]
+    runs-on: [self-hosted, stackhpc-kayobe-config-kolla-builder-rl9]
     timeout-minutes: 720
     permissions: {}
     strategy:
@@ -107,11 +107,6 @@ jobs:
           ref: refs/heads/stackhpc/${{ needs.generate-tag.outputs.openstack_release }}
           path: src/kayobe
 
-      # FIXME: Failed in kolla-ansible : Ensure the latest version of pip is installed
-      - name: Install dependencies
-        run: |
-          sudo dnf -y install python3-virtualenv
-
       - name: Setup networking
         run: |
           if ! ip l show breth1 >/dev/null 2>&1; then
@@ -127,14 +122,6 @@ jobs:
           sudo ip l set dummy1 up
           sudo ip l set dummy1 master breth1
 
-      # FIXME: Without this workaround we see the following issue after the runner is power cycled:
-      # TASK [MichaelRigart.interfaces : RedHat | ensure network service is started and enabled] ***
-      #   Unable to start service network: Job for network.service failed because the control process exited with error code.
-      #   See \"systemctl status network.service\" and \"journalctl -xe\" for details.
-      - name: Kill dhclient (workaround)
-        run: |
-          (sudo killall dhclient || true) && sudo systemctl restart network
-
       - name: Install Kayobe
         run: |
           mkdir -p venvs &&