test: Remove OCP4 test

Since api.ocp.ci.centos.org is going away:
https://lists.centos.org/pipermail/ci-users/2022-June/004547.html.

After discussion, OCP4 test will be removed here, but RHEL for Edge
downstream test will keep OCP4 case

test/data/openshift/edge-stage-server-template.yaml

@@ -1,89 +0,0 @@
----
-apiVersion: template.openshift.io/v1
-kind: Template
-labels:
-  app: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-  template: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-metadata:
-  annotations:
-    description: edge stage repo server
-  name: edge-stage-server
-
-objects:
-  - kind: Route
-    apiVersion: v1
-    metadata:
-      name: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-      annotations:
-        template.openshift.io/expose-uri: http://{.spec.host}{.spec.path}
-    spec:
-      to:
-        kind: Service
-        name: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-  - kind: DeploymentConfig
-    apiVersion: v1
-    metadata:
-      name: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-    spec:
-      replicas: 1
-      selector:
-        name: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-      strategy:
-        type: Recreate
-      template:
-        metadata:
-          labels:
-            name: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-        spec:
-          containers:
-            - name: ${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}
-              image: quay.io/osbuild/testing-rhel-edge-push:${EDGE_STAGE_REPO_TAG}
-              imagePullPolicy: Always
-              resources:
-                limits:
-                  memory: "1Gi"
-                  cpu: "1"
-                requests:
-                  memory: "512Mi"
-                  cpu: "50m"
-              securityContext:
-                capabilities: {}
-                privileged: false
-              terminationMessagePath: /dev/termination-log
-          imagePullSecrets:
-            - name: osbuild-quay-edge-pull
-          dnsPolicy: ClusterFirst
-          restartPolicy: Always
-      triggers:
-        - type: "ConfigChange"
-  - kind: Service
-    apiVersion: v1
-    metadata:
-      name: "${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}"
-      annotations:
-        service.alpha.openshift.io/dependencies: '[{"name": "${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}",
-          "namespace": "", "kind": "Service"}]'
-        service.openshift.io/infrastructure: 'true'
-      creationTimestamp:
-    spec:
-      ports:
-        - name: web
-          protocol: TCP
-          port: 80
-          targetPort: 8080
-          nodePort: 0
-      selector:
-        name: "${EDGE_STAGE_SERVER_NAME}-${EDGE_STAGE_REPO_TAG}"
-      type: ClusterIP
-      clusterIP: None
-      sessionAffinity: None
-
-parameters:
-  - description: Edge stage repo server.
-    displayName: Edge stage repo server
-    name: EDGE_STAGE_SERVER_NAME
-    value: edge-stage-server
-  - description: Edge stage repo tag.
-    displayName: Edge stage repo tag
-    name: EDGE_STAGE_REPO_TAG
-    value: latest