Merge branch 'add-containerSecurityContext' into 'master'

feat: add containerSecurityContext configuration option

See merge request https://gitlab.com/gitlab-org/cluster-integration/auto-deploy-image/-/merge_requests/362



Merged-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Approved-by: Taka Nishida <tnishida@gitlab.com>
Approved-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Reviewed-by: Taka Nishida <tnishida@gitlab.com>
Co-authored-by: Alexander Rusa <alex@rusa.at>