[MacPorts] #58029: vtk: Update to 8.2.0

[MacPorts]

#58029: vtk: Update to 8.2.0
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  Reporter:  luzpaz  |      Owner:  stromnov
      Type:  update  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  vtk     |
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Comment (by snarkhunter):

 I added the diff.  I hope I did it correctly.

 I believe that the existing patch in files/patch-python37.diff needs to be
 updated, but since I'm not using any of the pythonxx variants of vtk I
 have no way of testing it, and didn't try fixing it.

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Ticket URL: <https://trac.macports.org/ticket/58029#comment:5>
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