Make render delegate works in batch mode when running under husk

[cpichard]

Describe the feature you'd like
At the moment when we run husk the render delegate uses the interactive session mode as it's not clear if husk will update the scene after having it passed to arnold. This result in an increased memory consumption as the scene remains in memory.
We want to double check that husk can be used in interactive mode and update arnold-usd such that husk uses the batch mode which deletes the scene in memory when arnold has its internal data ready to render.

[autodesk-oss-arnold-bot]

Issue synced internally to ARNOLD-15139