primvars:sss_setname works with the procedural and kick, but not with the render delegate and husk

**Describe the bug**
primvars:sss_setname works with the procedural and kick, but not with the render delegate and husk
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**Used Software Versions**
- Arnold: 7.2.1.0
- USD: 22.11

The report identifies primvars:sss_setname and the procedural, kick, render delegate, and husk paths, but names no repository files or tests. Start by reproducing the difference with Arnold 7.2.1.0 and USD 22.11, then trace how the primvar is handled in each path; done means the render delegate and husk honor the setting like the procedural and kick workflows.

Written by the indexing model from the issue text.