Move oc deploy in oc rollout

[0xmichalis]

#8927 adds support for rollout, the command used by Kubernetes to manage deployments. We need to move bits from oc deploy in rollout subcommands.

oc deploy --latest to oc rollout again
oc deploy --latest (as it should work) to oc rollout latest

If anybody can come up with more appropriate names, please do so.

Before we add those, I am going to create an /instantiate endpoint that can be used by both oc deploy --latest and the rollout subcommands (and every other client for that matter). Not sure if there is any benefit in waiting for this to be added upstream, it seems that pros outweight cons at this point for having it.

I still need to think about the rest. Both oc deploy --cancel and oc deploy --retry are OpenShift-specific at this point and we still need to add perm-failed (kubernetes/kubernetes#14519) upstream and then get back to those. --enable-triggers is OS-specific atm but will work for both too.

@fabianofranz @ironcladlou @mfojtik @smarterclayton

[0xmichalis]

Last pieces left here:

• deploy --cancel to rollout cancel - oc: add rollout cancel #10731
• deploy --retry to rollout retry (@mfojtik do you want this or should I open a PR for retry?)

[mfojtik]

@Kargakis i will do it.