Need to update release process for RCs #438
Description
What happened?
The current release process doesn't take into account RCs, we should update it similarly to what we did for upstream Crossplane. It could make sense to split it by "phase" here too.
The full procedure we followed to release v1.15.0-up.1.rc.3 can be found here.
How can we reproduce it?
N.A.
What environment did it happen in?
N.A.