[VPA] Feature: Setting priorityClassName on a per-component basis

[fullykubed]

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

In the VPA chart, I'd like to be able to set the priorityClassName on a per-component basis rather than globally for all pods. While some pods like the admission-controller should always have very high priority, others like the updater do not need high priority.

Describe the solution you'd like

See above.

Describe alternatives you've considered

Manually patching the helm chart on our end.

Additional context

None