charts/authentik: worker: add support for multiple queue workers

[josegomezr]

Introducing .Values.worker.queues to provide a way to replicate the worker deployment with customizations.

The default value:

#...
worker:
  ## authentik worker queue distribution
  #  key => worker config definition
  #
  queues:
    default:
      name: worker

Will emit the same deployment, but by providing:

#...
worker:
  ## authentik worker queue distribution
  #  key => worker config definition
  #
  queues:
    default:
      name: worker
    high-priority:
      replicas: 2
      name: worker-high-priority
      args:
        - worker
        - --queues
        - high-priority

The values on the .Values.worker.queues.* are merged with .Values.worker so defaults can be set for all deployments, and every queue deployment can scale up/down or have special affinities or args (like in the example)

[rissson]

Needs goauthentik/authentik#21848, as such I'm marking this as draft for the time being