Update and re-enable k8s e2e test

[slintes]

k8s e2e test didn't work anymore since SNR switched from systemctl reboot to sysrq based reboots. For some reason reboot also doesn't work anymore, the kind node container doesn't restart, sometimes at least. As a workaround switch to a custom build of SNR, which just starts kubelet as "reboot" command (kubelet is stopped in e2e tests for making node unready)

Some other things modified along the way:

• update versions
• use 2 workers only to save memory
• skip control plane test (we have 1 only)
• allow to configure SNR strategy

[openshift-ci[bot]]

Skipping CI for Draft Pull Request. If you want CI signal for your change, please convert it to an actual PR. You can still manually trigger a test run with /test all

[slintes]

/test 4.14-openshift-e2e

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: clobrano, slintes

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/medik8s/node-healthcheck-operator/blob/main/OWNERS)~~ [clobrano,slintes] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[clobrano]

Giving a chance to get more reviews, feel free to unhold /hold

[slintes]

/hold cancel