Include helm chart version in cluster-autoscaler version matrix

[mewa]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

This PR documents minimum required Helm chart versions to be used with specific cluster-autoscaler versions. It also adds a script that scans existing chart tags and updates README according to findings.

Which issue(s) this PR fixes:

Fixes #6539

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: mewa (af0636a, 89595cb, c4e0e58, c6f1d2b, 6e6622f, 6684448, 3a078ec, 297295a)

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[Shubham82]

@mewa, you have to sign the CLA before the PR can be reviewed.
See the following document to sign the CLA: Signing Contributor License Agreements(CLA)

[Shubham82]

To check EasyCLA

/easycla

[gjtempleton]

Hey, thanks for this.

Can you rebase, plus stick the script under the hack subdirectory of the cluster-autoscaler directory where we have other release related scripts please?

[mewa]

Sure @gjtempleton, I moved the script and rebased the changes.

[Shubham82]

@mewa
please resolve the failed test case.

[mewa]

@Shubham82 done.

[gjtempleton]

Thanks.
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gjtempleton, mewa

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