vtkKdTree, vtkStaticFaceHashLinksTemplate: Fix bugs

Spiros Tsalikisrequested to merge
spiros.tsalikis/vtk:fix-bugs into master

Fix bugs in vtkKdTree, vtkStaticFaceHashLinksTemplate.

This MR fixes #19127 (closed).

Backport: release

Edited by Spiros Tsalikis

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