add commonLabels, commonAnnotations, podLabels and podAnnotations

[ecthelion77]

Overview

What this PR does / why we need it

Special notes for your reviewer

Checklist

• Change log updated in Chart.yaml (see the contributing guide for details)
• Chart version bumped in Chart.yaml (see the contributing guide for details)
• Documentation regenerated by running make docs

[ecthelion77]

/assign @sagikazarmark

[sagikazarmark]

Thanks for submitting a PR!

To be honest, I'm not sure I understand why all this change is necessary to implement this feature.

• Why the added dependency?
• Why the formatting changes in values.yaml?
• Documentation format is not followed in values.yaml

I'd probably just modify the dex.labels template and create another one called dex.annotations.

Even then, I'm not sure why this feature is necessary: most objects already support adding custom labels and annotations.