This commit changes the behavior of the Clay Strips brush so that
it aligns more with expectations.
* Tilt is applied consistently to the sculpt plane instead of only being
applied if the brush is both using the calculated Sculpt plane and not
using the original normal.
* The sampled normal is used for the subsequent brush plane check
instead of being incorrect when alternate sculpt planes are used.
Pull Request: https://projects.blender.org/blender/blender/pulls/136965
ba29593a17