[testing] Remove openstack-tempest-all

[lpiwowar]

No description provided.

[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

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lpiwowar
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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/6429f9e4956740f4846324936bc6767d

✔️ openstack-meta-content-provider SUCCESS in 4h 48m 24s
❌ tcib-crc-podified-edpm-baremetal FAILURE in 1h 33m 52s
❌ tcib-podified-multinode-edpm-deployment-crc TIMED_OUT in 3h 11m 45s