Fix #160256: Cycles OptiX crash with OSL camera and shader raytrace

This particular combination was not computing the stack size correctly,
since shader raytrace was moved to a separate OptiX module. It needs to
be set manually now that it's not part of the same module.

Regression from c51fcf73a7.

Pull Request: https://projects.blender.org/blender/blender/pulls/160318

tests/python/cycles_render_tests.py

@@ -78,6 +78,7 @@ BLOCKLIST_OPTIX_OSL_ALL = BLOCKLIST_OPTIX_OSL_LIMITED + [
     'ambient_occlusion.*.blend',
     'bake_bevel.blend',
     'bevel.blend',
+    'osl_camera_bevel.blend',
     'raycast.*.blend',
     'principled_bsdf_bevel_emission_137420.blend',
     # Dicing tests use wireframe node which doesn't appear to be supported with OptiX OSL

tests/python/eevee_render_tests.py

@@ -56,6 +56,7 @@ BLOCKLIST = [
     "osl_camera_cubemap.blend",
     "osl_camera_cubemap_auto_derivatives.blend",
     "osl_camera_offset_in_volume.blend",
+    "osl_camera_bevel.blend",
     # Extreme texture values interpolate differently on different GPUs.
     "image_log.blend",
     # Exhibit the LTC light leaking issue. To be enabeld back after fixing.