* Adds new entry into python CMakeLists.txt for running these tests
* Adds `sculpt_brush_render_tests.py` as the report runner and
test data initializer for the sculpt tests.
This commit adds the ability to do render tests with the Draw brush in
Sculpt mode on a specified mesh by specifying and performing a stroke in
area-space coordinates.
Like other render tests, these tests map a single .blend file to a
single reference image. Currently we test the following cases:
* A "base" mesh.
* A mesh with a Subdiv modifier added but not applied to it.
* A mesh with a basis & relative shape key added.
* A mesh with the multiresolution modifier added.
The associated reference image used is 200x200 pixels, in testing
with the draw brush, even this small resolution was able to detect
differences in detail caused by major regressions.
In total, the new files in the associated assets repository sum up
to roughly 4.5 MB.
Other than the mesh and modifiers, each of the files also contains a
scene with a camera, with workbench settings set to use a matcap for
the final rendering to better highlight curvature differences.
Part of #130772
Pull Request: https://projects.blender.org/blender/blender/pulls/133602
