Render delegate doesn't render frame ranges when running with husk as host

[cpichard]

Describe the bug
When we run a render through husk with a frame range, the arnold render delegate will render only the first frame and copy it.

To Reproduce
Steps to reproduce the behavior:

1. husk --complexity low -R Arnold -r 320 240 -o render.%f.tif -f 1 -n 10 chess_animated.usd
2. replace chess_animated.usd by an animated scene

Expected behavior
A clear and concise description of what you expected to happen.

[autodesk-oss-arnold-bot]

Issue synced internally to ARNOLD-15140