fix: remove UPDATE operation from mutatingwebhookconfiguration

[aramase]

Signed-off-by: Anish Ramasekar [email protected]

Reason for Change:

• If the pod is in terminating state, we return early in the handler as mutation/check doesn't apply to those.

Requirements

• squashed commits
• included documentation
• added unit tests and e2e tests (if applicable).

Issue Fixed:

fixes #647

Please answer the following questions with yes/no:

Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?

• yes
• no

Notes for Reviewers:

[ringerc]

This change is described as

If the pod is in terminating state, we return early in the handler as mutation/check doesn't apply to those.

but in reality, the change appears to be to not fire the webhook on pod UPDATE at all. That's a bit confusing.