add templated Service annotations

[TheCase]

Summary

add templated metadata.annotations to the Service

Use cases

useful for anyone that uses Service annotations to control things like load balancer controllers, etc.

Proposed solution

like what has been done for metadata.labels in the Service template, but for annotations

Is there a workaround to accomplish this today?

manually add to the manifest, post deploy

[dkamenov-fitted]

@jpcoenen, is this something that can be merged?