Add ability to set annotations to registry migrations job
Summary
The gitlab registry migrations job at https://gitlab.com/gitlab-org/charts/gitlab/-/blob/master/charts/registry/templates/migrations-job.yaml needs the ability to set annotations like how the standard migrations job at https://gitlab.com/gitlab-org/charts/gitlab/-/blob/master/charts/gitlab/charts/migrations/templates/_jobspec.yaml?ref_type=heads#L13-18. This is necessary for tools such as helm and argocd to be able to remove the old job before creating the new job.
ex. however it should be able to be set by the user of the chart instead of hard coded.
"helm.hook": "pre-install"
"helm.sh/hook-delete-policy": "before-hook-creation,hook-succeeded"
related issues: