Feature/pod annotations

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What does this MR do?

Allows the ability for the kubernetes executor to add pod annotations to the build pods

Why was this MR needed?

having annotations on the build pods allows kube2iam to assign iam roles to the build pods

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

  • Documentation created/updated
  • Tests
    • Added for this feature/bug
    • All builds are passing
  • Branch has no merge conflicts with master (if you do - rebase it please)

What are the relevant issue numbers?