Merge branch 'feature/implements-pod-priority-class-name' into 'master'

Implement priorityClassName to deployment template

See merge request https://gitlab.com/gitlab-org/cluster-integration/auto-deploy-image/-/merge_requests/300



Merged-by: Hordur Freyr Yngvason <hfyngvason@gitlab.com>
Approved-by: Hordur Freyr Yngvason <hfyngvason@gitlab.com>
Co-authored-by: Ivan Kovačić <ivan.kovacic@barrage.net>