- Add a double precision GJK version.
- Change the Simplex size from a VectorInt to a int32, previously it was done to save some branching operations, but compare to the load and store operations it was not worth it.
- This solution is only for triangle mesh. Height field never triggered this issue because it is usually composed of small triangles. However in the editor the plane shape generates a big triangle mesh which cause this issue when user add it for the entire world.
#jira UE-207144
#rb Benn.Gallagher
[CL 34206018 by vincent robert in ue5-main branch]