Batch authservice checksum updates

[mjnagel]

Is your feature request related to a problem? Please describe.

Created from thread. Currently we apply a new checksum to the authservice deployment for each chain addition, update, or deletion. This results in multiple applies, sometimes for a single package.

Describe the solution you'd like

We should find a way to batch the checksum applies so that there is not excessive applies or cycling of the authservice pod. This could be done in two ways:

• Simple: batch per packages so that a package with multiple authservice clients only results in one checksum. This would be easy to move the checksum functionality to the end of the authservice reconciliation
• Harder: batch on some time interval to handle multiple packages at once.