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Ensure that the glyphNormalMatrix is used in shader

Cory Quammen requested to merge cory.quammen/vtk:ensure-normal-matrix-attribute-exists into master

Before trying to add the glyphNormalMatrix as an attribute for the vertex shader in vtkOpenGLGlyphHelper, make sure it is used in the program. This prevents error messages about the attribute not being found in the program.

Modified existing test that removes all lights from the renderer to exercise the former error condition and verify that it is fixed.

Closes paraview/paraview#18267 (closed)

Edited by Cory Quammen

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