Add a 4.18 only metallb only frrk8s-cno lane (openshift#55937)

Temporary lane as in 4.18 the transition between frr-k8s deployed by
metallb and frr-k8s deployed by cno will happen.

Signed-off-by: Federico Paolinelli <fpaoline@redhat.com>

ci-operator/config/openshift/metallb/openshift-metallb-main.yaml

@@ -59,6 +59,18 @@ tests:
         IP_STACK=v4
         BGP_TYPE=frr-k8s
     workflow: baremetalds-metallb-e2e
+- as: metallb-e2e-metal-frrk8s-cno
+  cluster: build05
+  steps:
+    cluster_profile: equinix-ocp-metal
+    env:
+      DEVSCRIPTS_CONFIG: |
+        IP_STACK=v4
+        NETWORK_TYPE=OVNKubernetes
+      E2E_TESTS_CONFIG: |
+        IP_STACK=v4
+        BGP_TYPE=frr-k8s-cno
+    workflow: baremetalds-metallb-e2e
 - as: metallb-e2e-metal-ipi-ovn
   cluster: build05
   steps:

ci-operator/jobs/openshift/metallb/openshift-metallb-main-presubmits.yaml

@@ -133,6 +133,85 @@ presubmits:
         secret:
           secretName: result-aggregator
     trigger: (?m)^/test( | .* )metallb-e2e-metal-frrk8s,?($|\s.*)
+  - agent: kubernetes
+    always_run: true
+    branches:
+    - ^main$
+    - ^main-
+    cluster: build05
+    context: ci/prow/metallb-e2e-metal-frrk8s-cno
+    decorate: true
+    labels:
+      ci-operator.openshift.io/cloud: equinix-ocp-metal
+      ci-operator.openshift.io/cloud-cluster-profile: equinix-ocp-metal
+      ci-operator.openshift.io/cluster: build05
+      ci.openshift.io/generator: prowgen
+      pj-rehearse.openshift.io/can-be-rehearsed: "true"
+    name: pull-ci-openshift-metallb-main-metallb-e2e-metal-frrk8s-cno
+    rerun_command: /test metallb-e2e-metal-frrk8s-cno
+    spec:
+      containers:
+      - args:
+        - --gcs-upload-secret=/secrets/gcs/service-account.json
+        - --image-import-pull-secret=/etc/pull-secret/.dockerconfigjson
+        - --lease-server-credentials-file=/etc/boskos/credentials
+        - --report-credentials-file=/etc/report/credentials
+        - --secret-dir=/secrets/ci-pull-credentials
+        - --secret-dir=/usr/local/metallb-e2e-metal-frrk8s-cno-cluster-profile
+        - --target=metallb-e2e-metal-frrk8s-cno
+        command:
+        - ci-operator
+        image: ci-operator:latest
+        imagePullPolicy: Always
+        name: ""
+        resources:
+          requests:
+            cpu: 10m
+        volumeMounts:
+        - mountPath: /etc/boskos
+          name: boskos
+          readOnly: true
+        - mountPath: /secrets/ci-pull-credentials
+          name: ci-pull-credentials
+          readOnly: true
+        - mountPath: /usr/local/metallb-e2e-metal-frrk8s-cno-cluster-profile
+          name: cluster-profile
+        - mountPath: /secrets/gcs
+          name: gcs-credentials
+          readOnly: true
+        - mountPath: /secrets/manifest-tool
+          name: manifest-tool-local-pusher
+          readOnly: true
+        - mountPath: /etc/pull-secret
+          name: pull-secret
+          readOnly: true
+        - mountPath: /etc/report
+          name: result-aggregator
+          readOnly: true
+      serviceAccountName: ci-operator
+      volumes:
+      - name: boskos
+        secret:
+          items:
+          - key: credentials
+            path: credentials
+          secretName: boskos-credentials
+      - name: ci-pull-credentials
+        secret:
+          secretName: ci-pull-credentials
+      - name: cluster-profile
+        secret:
+          secretName: cluster-secrets-equinix-ocp-metal
+      - name: manifest-tool-local-pusher
+        secret:
+          secretName: manifest-tool-local-pusher
+      - name: pull-secret
+        secret:
+          secretName: registry-pull-credentials
+      - name: result-aggregator
+        secret:
+          secretName: result-aggregator
+    trigger: (?m)^/test( | .* )metallb-e2e-metal-frrk8s-cno,?($|\s.*)
   - agent: kubernetes
     always_run: true
     branches: