feat: support pods that are owned by deployments

[cgetzen]

Summary

Resolves #21

The deployment example in https://github.com/SlinkyProject/slurm-bridge/blob/main/docs/workload.md#annotations does not work.

Given that Pod is a supported workload, pods owned by deployments should also be supported.

Checklist

• I have read
  CONTRIBUTING.md
  and the
  Code of Conduct.
• New or existing tests cover these changes (where applicable).
• Documentation is updated if user-visible behavior changes.

Breaking Changes

No breaking changes

Testing Notes

Integration tests have been added for the scheduler, similar to controller and admissions integration tests.

Applying the example from the readme now schedules correctly:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: pause
  # `slurm-bridge` annotations on parent object
  annotations:
    slinky.slurm.net/timelimit: "5"
    slinky.slurm.net/account: foo
spec:
  replicas: 2
  selector:
    matchLabels:
      app: pause
  template:
    metadata:
      labels:
        app: pause
    spec:
      schedulerName: slurm-bridge-scheduler
      containers:
        - name: pause
          image: registry.k8s.io/pause:3.6
          resources:
            limits:
              cpu: "1"
              memory: 100Mi

Additional Context