Remove the manual sha digest assignment to RHODS on the following places.

1. odh-manifest -> ImageStream (https://github.com/red-hat-data-services/odh-manifests/blob/master/jupyterhub/notebook-images/overlays/additional/minimal-notebook-imagestream.yaml#L23)
2. rhods-live-builder -> CSV (https://gitlab.cee.redhat.com/data-hub/rhods-live-builder/-/blob/main/rhods-operator-live/bundle/template/manifests/clusterserviceversion.yml.j2#L696)

A proposed way to archive this is to implement a GitHub action (odh-manifests) and a GitLab action (rhods-live-builder) that automatically finds the latest image in the quay registry and assign the corresponding sha digest.

Scopeo [1] is a command-line utility that performs various operations on container images and image repositories that could be used for this work. 

References:

[1] https://github.com/containers/skopeo