As part of migrating from jupyterhub to notebook controller we have a lot of migration specific code in deployer as well as some floating objects in OpenShift. We should get rid of these remaining objects in 1.17

1. Enable deletion of CRO objects in deployer (there is commented out code already)
2. Remove yq binary from deployer repo (and update corresponding dockerfiles)
3. Remove all migration specific code except anything that is required specifically for CRO cleanup.
   1. This means we will have a follow-ontask in 1.18 to get rid of migration code that's specific to CRO
4. Ensure that `odh-enabled-applications-config` has the right flags set. We've noticed in 1.15->1.16 testing that both jupyterhub and jupyter are set to enabled. This is possibly an odh-dashboard bug, so confirm with odh-dashboard developers one way or the other.