[DNM] Merge placement-operator into nova-operator

[ratailor]

This is initial PR for getting feedback from
reviewers.

Closes: OSPRH-14957

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ratailor

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [ratailor]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[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/dc2c941386c64b368047bf17f6f83f04

❌ openstack-meta-content-provider FAILURE in 43m 42s
⚠️ nova-operator-kuttl SKIPPED Skipped due to failed job openstack-meta-content-provider
⚠️ nova-operator-tempest-multinode SKIPPED Skipped due to failed job openstack-meta-content-provider
⚠️ nova-operator-tempest-multinode-ceph SKIPPED Skipped due to failed job openstack-meta-content-provider

[openshift-ci]

@ratailor: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/functional	1a8e81e	link	true	/test functional
ci/prow/precommit-check	1a8e81e	link	true	/test precommit-check

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[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/8cfc60002cf348e9a22768a03fd972bb

❌ openstack-meta-content-provider FAILURE in 43m 12s
⚠️ nova-operator-kuttl SKIPPED Skipped due to failed job openstack-meta-content-provider
⚠️ nova-operator-tempest-multinode SKIPPED Skipped due to failed job openstack-meta-content-provider
⚠️ nova-operator-tempest-multinode-ceph SKIPPED Skipped due to failed job openstack-meta-content-provider

[ratailor]

do-not-merge

This is not WIP and for FR4, hence should not be accidently merge in FR3 if it passes all test anytime.

[stuggi]

we can not add it in the nova group. the nova operator must be migrated to be multi group so that we can add the CRD like it is today

    kind: PlacementAPI
    listKind: PlacementAPIList
    plural: placementapis
    singular: placementapi