* Removes `SculptSession` from being passed to the raycast callbacks,
it was only used to determine the existence of the `StrokeCache` and
has been replaced with a boolean.
* Use C++ math library where possible.
* Use const where possible.
* Moves most related `SCULPT_` prefixed methods into the corresponding
namespace.
* Renames `SCULPT_stroke_get_location` to `stroke_get_location_bvh`
to avoid potential collisions in the `sculpt_paint` namespace with
other editors & be more clear about the usage.
Pull Request: https://projects.blender.org/blender/blender/pulls/138796
15c80a29a8