Restructure templates and tests directory to multi-group layout

[auniyal61]

Moves all Nova templates and tests and drops 'nova prefix' from subdirectories
templates under templates/nova/
tests under test/functional/nova/ and updates relative paths.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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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/36f76bf635b547f9979f6ec0d7db40d1

❌ openstack-meta-content-provider FAILURE in 6m 57s
⚠️ 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

[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/ef9bb0f68c294ee5b3b4fb18ec83cdb0

✔️ openstack-meta-content-provider SUCCESS in 1h 31m 23s
❌ nova-operator-kuttl FAILURE in 46m 10s
❌ nova-operator-tempest-multinode FAILURE in 1h 12m 00s
❌ nova-operator-tempest-multinode-ceph FAILURE in 1h 11m 23s

[auniyal61]

recheck

2026-03-27 10:25:47.839719 | controller |
2026-03-27 10:25:47.839736 | controller | TASK [edpm_prepare : Wait for OpenStack controlplane to be deployed _raw_params=oc wait OpenStackControlPlane {{ _ctlplane_name }} --namespace={{ cifmw_install_yamls_defaults['NAMESPACE'] }} --for=condition=ready --timeout={{ cifmw_edpm_prepare_timeout }}m] ***
2026-03-27 10:25:47.839749 | controller | Friday 27 March 2026  09:55:47 +0000 (0:00:30.068)       0:09:36.537 **********
2026-03-27 10:25:47.839761 | controller | Friday 27 March 2026  09:55:47 +0000 (0:00:30.068)       0:09:36.535 **********
2026-03-27 10:25:47.839780 | controller | task path: /home/zuul/src/github.com/openstack-k8s-operators/ci-framework/roles/edpm_prepare/tasks/kustomize_and_deploy.yml:112
2026-03-27 10:25:47.839790 | controller | fatal: [localhost]: FAILED! =>
2026-03-27 10:25:47.839801 | controller |     changed: true
2026-03-27 10:25:47.839811 | controller |     cmd:
2026-03-27 10:25:47.839821 | controller |     - oc
2026-03-27 10:25:47.839831 | controller |     - wait
2026-03-27 10:25:47.839841 | controller |     - OpenStackControlPlane
2026-03-27 10:25:47.839850 | controller |     - controlplane
2026-03-27 10:25:47.839860 | controller |     - --namespace=openstack
2026-03-27 10:25:47.839870 | controller |     - --for=condition=ready
2026-03-27 10:25:47.839880 | controller |     - --timeout=30m
2026-03-27 10:25:47.839889 | controller |     delta: '0:30:00.107131'
2026-03-27 10:25:47.839899 | controller |     end: '2026-03-27 10:25:47.804036'
2026-03-27 10:25:47.839910 | controller |     msg: non-zero return code
2026-03-27 10:25:47.839919 | controller |     rc: 1
2026-03-27 10:25:47.839929 | controller |     start: '2026-03-27 09:55:47.696905'
2026-03-27 10:25:47.839965 | controller |     stderr: 'error: timed out waiting for the condition on openstackcontrolplanes/controlplane'
2026-03-27 10:25:47.839987 | controller |     stderr_lines:
2026-03-27 10:25:47.839997 | controller |     - 'error: timed out waiting for the condition on openstackcontrolplanes/controlplane'
2026-03-27 10:25:47.840007 | controller |     stdout: ''
2026-03-27 10:25:47.840017 | controller |     stdout_lines: []
2026-03-27 10:25:47.840030 | controller |

[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/9f9cf6fa973f4e73990a076b327f4ac0

✔️ openstack-meta-content-provider SUCCESS in 1h 31m 47s
❌ nova-operator-kuttl FAILURE in 1h 05m 05s
❌ nova-operator-tempest-multinode RETRY_LIMIT in 3m 47s
❌ nova-operator-tempest-multinode-ceph FAILURE in 1h 13m 26s

[auniyal61]

recheck

[openshift-ci]

@auniyal61: The following test 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	dca5957	link	true	/test functional

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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/639cfd61189e43f78395ededb32eb26a

✔️ openstack-meta-content-provider SUCCESS in 1h 29m 41s
❌ nova-operator-kuttl FAILURE in 1h 05m 05s
❌ nova-operator-tempest-multinode FAILURE in 1h 12m 35s
❌ nova-operator-tempest-multinode-ceph FAILURE in 1h 12m 10s