[Work in progress]
Strechtch profile curves around turns in curve to mesh. This is done by
1) computing the desired stretch amount to keep the connecting edges parallel to the curve segment.
2) represent a profile point in the profile's own transform space, and1) compute the desired stretch amount to keep the connecting edges parallel to then stretch curve segment.
it along2) compute a matrix to scale the profile normale by the amount around its main position, and ONLY in the direction of the curvature.
This addresses T80979.