cherrypick the fix in VTK of vtkPyramid.cxx compute gradient into ParaView
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The changes for fixing the gradient computation of vtkPyramid need to go into 3.14.1. The VTK commit shas are: 21717ccb3a2ca97d869d05923053f7dcc627e6f8 ae9bd3a48b9e96a1fcc8aa48b26cc9fc03a179f2 3c7eb9a57c398f42db0d17aa1b2ec1636feaf251 6332bbee82445ed5a3c6cce81c0675f152ee8649 2aeb25397ce8db221f74bdc9345e2d8ba6c3aaaf