Datadog Mutating webhook should be deleted on helm uninstall

[EliSzBr]

Deleting the chart leaves an orphaned webhook created by the workload.
In cases where: clusterAgent.admissionController.failurePolicy is set to Fail - This leaves the cluster with an enforcing webhook without a backend workload to handle requests --> cluster is deadlocked... (also from new chart to be installed)

Describe what you expected:
mutating webhook should be deleted.
perhaps as post-delete helm hook? regardless - should probably be deleted...

Steps to reproduce the issue:
install chart (we are version 3.67.1, didn't see it was fixed since.)
set clusterAgent.admissionController.failurePolicy: Fail
delete the release
try to run pod.

Thank you 😁