Introduce changes to *Status fields to track OnDelete

* Remove (unnecessary) API changes proposed to `PodClique` and `PodCliqueScalingGroup`

* Rename `*RollingUpdateProgress` status fields to `*UpdateProgress` status fields to
  more generically track update information.

Signed-off-by: Saketh Kalaga <saketh.kalaga@sap.com>

Author: renormalize