Add pubsub to validation webhook

[JaydipGabani]

Describe the solution you'd like
[A clear and concise description of what you want to happen.]
With #2538 audit can now export violations using pubsub model. Expand the same use case for validation webhook as well.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Gatekeeper version:
• Kubernetes version: (use kubectl version):

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[sozercan]

not stale

[JaydipGabani]

@sozercan please assign this to me

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[maxsmythe]

Still interested in this?

[DorB-P]

@maxsmythe Yes absolutely! Very much! This would be AMAZING!

[DorB-P]

Hi guys, think we can re-add it as a milestone?
Providing that this is a more reliable solution than reading events.

I guess this would enjoy a performance boost after #2805 and #2889

• Alternatively, this solution is also great - Decision log exporter side car #1037 . Has there ever been any advancement?

Thanks!