Add Gatekeeper fail open/closed helm value

[akashsinghal]

What would you like to be added?

The current Assign mutation CRD does not specify the failurePolicy explicitly. It relies on the default value which is fail closed. https://open-policy-agent.github.io/gatekeeper/website/docs/externaldata#api Ratify should add a single gatekeeperFailurePolicy flag which can define open/close (close by default for backwards compatability). This flag will then set the according failurePolicy field.

This change should be accompanied with documentation on the website. ratify-project/ratify-web#128

Anything else you would like to add?

No response

Are you willing to submit PRs to contribute to this feature?

• Yes, I am willing to implement it.