With a previous change[0] that moved rabbit-init jobs to dynamic
in helm-toolkit, this change continues that work by moving the
keystone rabbit-init job to dynamic as well.
[0] https://review.opendev.org/c/openstack/openstack-helm-infra/+/671727
Change-Id: Iec2ea3fdf36e19ac4f2e203389dbe19737d14c3a