vtkTemporalPathLineFilter: fixing a regression wrt point id mapping

Yohann Bearzi (Kitware)requested to merge
yohann.bearzi/vtk:path-line-bug into master

When refactoring vtkTemporalPathLineFilter to make it inherit from vtkTemporalAlgorithm, the way the points are mapped using global ids / IdChannelArray / the selection dataset was broken. This commit restores the logic from before the refactoring, while keeping the refactoring into effect.

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