Drop etcd from tcib

[raukadah]

Jira: https://issues.redhat.com/browse/OSPRH-9112

[openshift-ci]

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

[lhh]

This is fine. My understanding is that there is no operator for this container at the moment; if we need one later, we can put it back.

[openshift-ci]

@lhh: changing LGTM is restricted to collaborators

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[rlandy]

/lgtm

[rlandy]

/approve

[openshift-ci]

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