Adding two helper functions for VAP and CEL admission library

[slashben]

Overview

In this PR I am adding two simple CLI commands related to VAP (Validating Admission Policies) and Kubescape's CEL Admission Policy Library.

One is kubescape vap-helper deploy-library that downloads release artifacts from the CEL Admission Policy Library repo (policies) and prints it to the STDOUT (so it can be used in conjunction with | kubectl apply -f )

The second is kubescape vap-helper create-policy-binding --name my-policy-binding --policy C-0012 --namespace test command that creates a policy binding object YAML and prints it to STDOUT (so it can be used in conjunction with | kubectl apply -f as well)

Checklist before requesting a review

• My code follows the style guidelines of this project
• I have commented on my code, particularly in hard-to-understand areas
• I have performed a self-review of my code
• If it is a core feature, I have added thorough tests.
• New and existing unit tests pass locally with my changes

[dwertent]

We should consider naming the command simply vap instead of vap-helper.
Also, maybe we should use the term download instead of deploy-library.

A different option, we already have the download command, so maybe we should have the command as follows:

kubescape download vap

I'm not familiar with the VAP policies to comment on the create-policy-binding command.

[slashben]

We should consider naming the command simply vap instead of vap-helper.

I thought about it from the beginning. The reason I choose the "-helper" suffix is that these functionalities are not implementing "VAP" but convenience functions to manage it more easily.

Also, maybe we should use the term download instead of deploy-library.

But the core functionality is to deploy the library in the cluster with it, not to download (see my next comment as well)

A different option, we already have the download command, so maybe we should have the command as follows

We could split the "deploy" to two parts, download and deploy, but I am not sure about the benefits. I don't see the download to be used as a standalone command yet (what for?).