Some Vulkan shader codegen tests fail

[DDoS]

I get this error diff for testHdStCodeGen_Vulkan_Curves_Bindless and testHdStCodeGen_Vulkan_Curves_Indirect.

2633a2634,2635
>     color.rgb = ApplyColorOverrides(color).rgb;
> 
2642c2644,2646
<     color = ShadingTerminal(vec4(Peye, 1), Neye, color, patchCoord);
---
>     color.rgb = mix(color.rgb,
>                     ShadingTerminal(vec4(Peye, 1), Neye, color, patchCoord).rgb,
>                     GetLightingBlendAmount());

I cannot find the original glslfx for the baseline code. The output shader is annotated with // line 1176 "basisCurves.glslfx", which looks like the output shader, not the baseline. I searched the code base for any other occurrence and found nothing. Either the baseline is wrong, or I'm not understanding something about the shader codegen.

Ran using Lavapipe on macOS.

[jesschimein]

Filed as internal issue #USD-10088