https://developer.blender.org/rB58d7be56424bbb2d59474ca9f57f3cc51034edab
Sculpt-dev: add tool slot override to sculpt.brush_stroke
- Sculpt.brush_stroke now has a property to override the tool slot.
- Note that this is somewhat different from how this was typically done in the past. Instead of physically switching slots we instead load the overriding slot’s brush’s channels into ss->cache->tool_override_channels.