Support serviceAccount

[hongbo-miao]

It would be great to support passing serviceAccount section like other Helm charts such as https://github.com/bitnami/charts/blob/main/bitnami/mlflow/values.yaml#L751-L764.

So it would be something like

image:
  repository: docker.io/tailwarden/komiser
  tag: 3.1.18
aws:
  region: us-west-2
serviceAccount:
  create: true
  annotations:
    eks.amazonaws.com/role-arn: arn:aws:iam::xxxxxxxxxxxxxx:role/KomiserRole-hm-komiser

Thanks! ☺️