Support ServiceAccount Labels and Annotations

[pinkfloydx33]

Similar to #9, please add support for adding annotations and labels to the generated ServiceAccount.

We are in the process of adopting Azure Workload Identity. In particular we are using it to leverage managed identity access to the Seq metastore. A requirement for this feature is a set of annotations and labels on the ServiceAccount.

For the moment we are using Helm's Kustomize post-processor to add the needed annotations and labels to the ServiceAccount, however it's a bit clunky. First class support would be appreciated and likely useful for other scenarios.

[nblumhardt]

Thank you for all the feedback/suggestions, this is great to know. We're planning to circle back around to the Helm chart once 2023.1 is out of beta and will take a close look at these then 👍