Unsupported array parameter error when reading RectLights

**Describe the bug**
When opening an usda file in Hydra, with a rect light and a filters parameter, we get an error that aborts rendering.

**To Reproduce**
Steps to reproduce the behavior:
1. Open the usda file in [internal.zip](https://github.com/Autodesk/arnold-usd/files/6968786/internal.zip).
2. The render delegate triggers an error message: `Unsupported array parameter /aiAreaLight1/aiAreaLightShape1.filters`

**Expected behavior**
There should be no error message and the light converter should not try to use HdArnoldSetParameter to convert the `filters` parameter on a light. We have other code paths for that.