Upon reaching Feature (API) freeze for CNV 4.19, we should create a stabilization branch for release-1.15 and bump main to v1.16

check as references:
https://github.com/kubevirt/hyperconverged-cluster-operator/pull/2282
https://github.com/kubevirt/project-infra/pull/2656
https://github.com/openshift/release/pull/37169
https://github.com/openshift/release/pull/37158
https://gitlab.cee.redhat.com/cpaas-midstream/openshift-virtualization/hyperconverged-cluster-operator/-/merge_requests/758
Git Pull Request: https://github.com/kubevirt/hyperconverged-cluster-operator/pull/2453

1.13 PRs

https://github.com/kubevirt/hyperconverged-cluster-operator/pull/3091 
https://github.com/kubevirt/hyperconverged-cluster-operator/pull/3092