Handle resource schedueling requests from caikit

## Is your feature request related to a problem? Please describe.

The Ray backend can currently request CPU/GPU resources per job, but caikit has no way of passing these in currently.

## Describe the solution you'd like

There is an issue open to add this feature, and the Ray backend will need to adapt to the approach caikit will use to specify resources, in order to appropriately schedule jobs according to resource needs

## Describe alternatives you've considered

## Additional context

Caikit issue: https://github.com/caikit/caikit/issues/494

Start by reading the caikit issue #494 to understand the resource specification it introduces, then inspect the Ray backend's existing per-job CPU/GPU resource request path. Done means the backend accepts caikit's resource requests and schedules jobs according to those requirements.

Written by the indexing model from the issue text.