Add labels to deployment of Fluent Operator

[jddcarreira]

The current helm chart allows adding custom labels, although they are not fully propagated to the deployment.

This merge requests adds the already existing variable for labels to the deployment of Fluent Operator.

[lpratas]

Hi! Can we have a review of this PR please? I'm also waiting for this change. Thank you

[jddcarreira]

Any update on this one @repeatedly @jvanzyl @azuwis ?

[cw-Guo]

Thanks @jddcarreira for your contributions.

It's kind of awkward here. Current we have two places to host the charts.
The first one is in the fluent-operator repo see: https://github.com/fluent/fluent-operator/tree/master/charts/fluent-operator, mostly for development.
The second one is this helm-charts repo, mostly for release.

Can you try to raise a pull request to the https://github.com/fluent/fluent-operator/tree/master/charts/fluent-operator first?

we can then sync the changes from fluent-operator repo to this helm chart repo.