Allow configuration of restartPolicy

[c0dearm]

Why are these changes needed?

For a correct configuration of the v2 autoscaler, it is necessary to override the restartPolicy. See: https://docs.ray.io/en/latest/cluster/kubernetes/user-guides/configuring-autoscaling.html#autoscaler-v2-with-kuberay

Related issue number

No issue

Checks

• [ ] I've made sure the tests are passing.
• Testing Strategy
  • [ ] Unit tests
  • [ ] Manual tests
  • [x] This PR is not tested :(