Webhooks cleanup upon Helm uninstall

[KernelPryanic]

What would you like added?

Cleanup of validation and mutation webhooks upon helm uninstall.

Currently it's leaving validatingwebhookconfiguration and mutatingwebhookconfiguration resources such as github-runners-validating-webhook-configuration or github-runners-mutating-webhook-configuration and in case of using and changing a custom name, these resources creates a conflict which results in failed calling webhook ... error. The workaround was documented in this issue #1558.

Why is this needed?

To make a cleanup more complete and avoid problems on changing the app name.

Additional context

Managing my infrastructure through Terraform Helm provider.

[github-actions]

Hello! Thank you for filing an issue.

The maintainers will triage your issue shortly.

In the meantime, please take a look at the troubleshooting guide for bug reports.

If this is a feature request, please review our contribution guidelines.