Remove or rename apiToken from webhooks

[samayer12]

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

A community question asked if apiToken is something that needs to be sanitized from the helm chart that is produced after running pepr build.

This might be a case of a lingering feature that causes confusion for users of Pepr. We could consider renaming it to reflect the non-sensitive nature of the apiToken field or removing it altogether. First, we'll have to research why it might have been introduced into the project.

[cmwylie19]

I like the idea of renaming it better. I think the intent is to have a unique path for the kube-apiserver to send the AdmissionReview objects