helm: master: add templating for resource-labels

[mythi]

What would you like to be added:
I would like to be able to set --resource-labels master args when using Helm for deployment. When this is set, also the RBAC rules must be updated.

Why is this needed:
To improve Helm based templating.

[marquiz]

Would be a nice improvement. Patches are welcome 😉
/help
/good-first-issue

[k8s-ci-robot]

@marquiz:
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In response to this:

Would be a nice improvement. Patches are welcome 😉
/help
/good-first-issue

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