Fix broken functionality - etcd-quorum-guard new name in OCP 4.11

[razo7]

We use webhook for checking the etcd-quorum-guard and ensuring that we don't put master nodes into maintenance mode which could interfere with the quorum of etcd between working masters.
Lately, after updating to OCP 4.11 in our CI, we have got errors in our e2e tests regarding that and apparently it is because the code have been checking the etcd-quorum-guard with the old name (etcd-quorum-guard) and not with the new one etcd-guard-pdb.

[openshift-ci]

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This pull-request has been approved by: razo7

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[slintes]

/lgtm

[slintes]

please do not cherry pick to release-12, it breaks OCP 4.10!
and btw, the title is misleading. Motivation isn't to fix the test, but the broken functionality

[slintes]

this will break release 0.12, but fixed by #29 afterwards

/cherrypick release-0.12

[openshift-cherrypick-robot]

@slintes: new pull request created: #30

In response to this:

this will break release 0.12, but fixed by #29 afterwards

/cherrypick release-0.12

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