[tls] nova novncproxy vencrypt support

[stuggi]

Issues a certificate for nova novncproxy if PodLevel tls is enabled and configures it as vencrypt secret on the novnc proxy.

Depends-On: https://github.com/openstack-k8s-operators/openstack-operator/pull/779 Depends-On: https://github.com/openstack-k8s-operators/nova-operator/pull/748 Depends-On: https://github.com/openstack-k8s-operators/dataplane-operator/pull/862

JIRA: OSPRH-6552

[softwarefactory-project-zuul[bot]]

This change depends on a change that failed to merge.

Change https://github.com/openstack-k8s-operators/nova-operator/pull/748 is needed.

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gibizer, stuggi

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