Discrete helm charts for CA, VPA

[jackfrancis]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

In order to better manage > 1 project helm chart in the kubernetes/autoscaler "monorepo", this PR re-organizes the parent "charts/" directory within the cluster-autoscaler/ and vertical-pod-autoscaler/ directories, respectively.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

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[adrianmoisey]

/lgtm
/hold

This seems fine, have you had a chance to test it? Or do you trust it will work?
Just thought I'd ask the question, unhold if you're confident

[omerap12]

I do think it would be better to use a GitHub Action instead of Docker. However, I’m curious why you chose this particular action. I’m not familiar with it, and I noticed it only has about 10 stars - https://github.com/losisin/helm-docs-github-action. So I’m wondering if it’s reliable enough for our use case.
Btw, I’m familiar with https://github.com/norwoodj/helm-docs, which has around 1.6K stars and seems to be more established.
Is there a specific reason you chose the other one instead?

[jackfrancis]

https://github.com/norwoodj/helm-docs is the official helm-docs project, but isn't a github action.

https://github.com/marketplace?query=helm-docs&type=actions is where I found this, it seems to be the best option.

If we think a lightly used action is not prefereable compared to doing it manually I can revert this change.