blocked-edges: Unblock 4.22 z-stream for MissingOpenVSwitch

[hongkailiu]

Testing has shown that the problematic logic will not be triggered on a z-stream upgrade within 4.22.

Drop the 4.22.0-4.22.14 alternation from the from regex, leaving only 4.21 sources flagged.

/cc @sdodson

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[sdodson]

/lgtm

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[hongkailiu]

https://redhat.atlassian.net/browse/MCO-2603

[wking]

Filling in some details on the testing, our initial expectation that 4.22.older were exposed was based on an incorrect understanding of their skopeo version vs. this check. But it turns out that 4.22.0's skopeo is new enough (>= 1.22.2) to not trip that conditional, with the release controller diff between 4.22.0 and 4.22.15 showing skopeo 2:1.22.2-1.el9_8 → 2:1.22.2-7.el9_8 and rpm-ostree-2026.1-6.el9_8. Those are both in the RHCOS image, and not out of the boot image. But for updates out of a level 4.22.0 cluster, it's that RHCOS image (and not the boot image) that Nodes are actually running.

Testing to confirm this read of the code, with ClusterBot launch 4.22.14 azure,multi source (logs):

$ oc get -o json clusterversion version | jq -c '.status.desired | {version, architecture}'
{"version":"4.22.14","architecture":"Multi"}
$ oc debug -q "$(oc get -o name nodes | head -n1)" -- chroot /host sh -c 'skopeo --version && rpm-ostree --version'
skopeo version 1.22.2 commit: cd48f3da7baca8d4e7bbf6af27f7810754ceb504
rpm-ostree:
 Version: '2026.1'
 Git: d956146df9cddea2e51ae6498764eb5ce5eabf06
 Features:
  - rust
  - compose
  - container
  - rhsm
$ oc patch clusterversion version --type json -p '[{"op": "remove", "path": "/spec/overrides"}]'
$ oc adm upgrade --to 4.22.15
Requested update to 4.22.15
$ oc adm upgrade | head -n1
info: An upgrade is in progress. Working towards 4.22.15: 134 of 1023 done (13% complete), waiting on etcd, kube-apiserver

And then an ~hour later, a successful update completion:

$ oc adm upgrade
Cluster version is 4.22.15
...

Similarly with ClusterBot launch 4.22.0 azure,multi (logs):

$ oc get -o json clusterversion version | jq -c '.status.desired | {version, architecture}'
{"version":"4.22.0","architecture":"Multi"}
$ oc debug -q "$(oc get -o name nodes | head -n1)" -- chroot /host sh -c 'skopeo --version && rpm-ostree --version'
skopeo version 1.22.2 commit: 4db1c56e8003ad07759a4d899254643d445dbe04
rpm-ostree:
 Version: '2026.1'
 Git: d956146df9cddea2e51ae6498764eb5ce5eabf06
 Features:
  - rust
  - compose
  - container
  - rhsm
$ oc patch clusterversion version --type json -p '[{"op": "remove", "path": "/spec/overrides"}]'
clusterversion.config.openshift.io/version patched
$ oc adm upgrade --to 4.22.15
Requested update to 4.22.15
$ oc adm upgrade | head -n1
info: An upgrade is in progress. Working towards 4.22.15: 28 of 1023 done (2% complete)

And then an ~hour later, another successful update completion:

$ oc adm upgrade
Cluster version is 4.22.15
...

And then, because 4.22.15 predates openshift/installer#10884, we still have an old 4.20 boot image to use to confirm post-update scale-up works:

$ oc -n openshift-machine-api get -o json machinesets.machine.openshift.io | jq -c '.items[].spec.template.spec.providerSpec.value.image' | sort | uniq -c
      3 {"offer":"aro4","publisher":"azureopenshift","resourceID":"","sku":"420-v2","type":"MarketplaceNoPlan","version":"9.6.20251015"}
$ oc -n openshift-machine-api get machinesets.machine.openshift.io
NAME                                          DESIRED   CURRENT   READY   AVAILABLE   AGE
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1   1         1         1       1           142m
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus2   1         1         1       1           142m
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus3   1         1         1       1           142m
$ oc -n openshift-machine-api scale --replicas 2 machinesets.machine.openshift.io ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1

And a few minutes later, there's a healthy new Node:

$ oc -n openshift-machine-api get -o wide machines.machine.openshift.io | grep centralus1
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1-x7h6l   Running   Standard_D4as_v5   centralus   1      4m5s   ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1-x7h6l   azure:///subscriptions/...   Running
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1-zqcjx   Running   Standard_D4as_v5   centralus   1      142m   ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1-zqcjx   azure:///subscriptions/...   Running
$ oc get nodes | grep centralus1
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1-x7h6l   Ready    worker                 5m31s   v1.35.6
ci-ln-3y1j0tt-1d09d-j52n8-worker-centralus1-zqcjx   Ready    worker                 141m    v1.35.6