Create chef roles for new shared runner managers
As we did in https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/13868, we should create new chef roles for the new shared
runners managers which were registered with https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/14510
Being done in https://gitlab.com/gitlab-com/gl-infra/chef-repo/-/merge_requests/923
Edited by Tomasz Maczukin