.cci.jenkinsfile: drop kubevirt testing

We're not shipping this right now and building it broke in the
upgrade to OCP 4.11 with:

```
[2022-11-17T16:25:11.894Z] 2022-11-17 16:25:08,317 ERROR - Command returned bad exitcode
[2022-11-17T16:25:11.894Z] 2022-11-17 16:25:08,317 ERROR - COMMAND: ['buildah', '--storage-driver', 'vfs', 'from', 'scratch']
[2022-11-17T16:25:11.894Z] 2022-11-17 16:25:08,317 ERROR -  STDERR: time="2022-11-17T16:25:08Z" level=warning msg="Reading allowed ID mappings: reading subuid mappings for user \"cosa\" and subgid mappings for group \"cosa\": no subuid ranges found for user \"cosa\" in /etc/subuid"
[2022-11-17T16:25:11.894Z] time="2022-11-17T16:25:08Z" level=warning msg="Found no UID ranges set aside for user \"cosa\" in /etc/subuid."
[2022-11-17T16:25:11.894Z] time="2022-11-17T16:25:08Z" level=warning msg="Found no GID ranges set aside for user \"cosa\" in /etc/subgid."
[2022-11-17T16:25:11.894Z] Error during unshare(CLONE_NEWUSER): Function not implemented
```

.cci.jenkinsfile

@@ -38,7 +38,7 @@ pod(image: imageName + ":latest", kvm: true, cpu: "${cpuCount}", memory: "${memo
 
     stage("Build Cloud Images") {
         cosaParallelCmds(cosaDir: "/srv", commands: ["Aliyun", "AWS", "Azure", "DigitalOcean", "Exoscale", "GCP",
-                                                     "IBMCloud", "KubeVirt", "OpenStack", "VMware", "Vultr"])
+                                                     "IBMCloud", "OpenStack", "VMware", "Vultr"])
 
         // quick schema validation
         utils.cosaCmd(cosaDir: "/srv", args: "meta --get name")