Merge topic 'backport_fixes' into release

18a38103 XdmfValuesHDF: Print error when there is a ranks mismatch
f6c748e2 vtkPiecewiseFunction: actually assign a fallback SearchMethod
382c038e vtkImageToStructuredPoints: fix improper bounds alignment
6d8305b9 vtkPostgreSQLDatabase: factor out clamping
7204b5be vtkAxis: fix clamping assignment
788628b4 vtkImplicitModeller: factor out clamping
523e1f61 vtkSelectionSource: factor out clamping
2bb8a912 vtkCamera: clamp ViewAngle before updating
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Reviewed-by: Nicolas Vuaille <nicolas.vuaille@kitware.com>
Merge-request: !11909