Add additionalLabels chart value

[mgarstecki]

Allows adding arbitrary labels to manifests deployed by the chart.

My use case is for anti-affinity rules with other deployments: I want to define a label across all relevant deployments, then an antiAffinity rule on all of them.

Even though it could work through podLabels, I don't find that field great for this use case: it doesn't make much sense to add it to the deployment selector.

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[gjtempleton]

HI @mgarstecki, thanks for the pull request!

If you could follow the bot's instructions for signing and verifying the CLA on this PR I'd be happy to give it a proper look over.
From a quick glance you'll need to also include a version bump in the Chart.yaml.

[mgarstecki]

Thanks for the feedback @gjtempleton 🙂

I'm working on getting the CLA signed by my employer, I'll get back to you once that's done !

[mgarstecki]

CLA signed, checking if it got picked up.

[gjtempleton]

Hey @mgarstecki, thanks for doing the work to get the CLA signed off.

This'll need a rebase, and a bump to the chart's minor version in the Chart.yaml, but other than that this looks good to me.

[mgarstecki]

Thank you for the review @gjtempleton !
PR rebased and release bumped :)

[gjtempleton]

/lgtm
/approve

Thanks!

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[APPROVALNOTIFIER] This PR is APPROVED

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

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