clang-tidy: fix `readability-redundant-access-specifiers` lints

Accelerators/Vtkm/Core/vtkmDataArray.h

Common/Core/vtkBitArray.h

Common/Core/vtkDataArray.h

Common/Core/vtkDataArrayCollection.h

Common/Core/vtkGarbageCollector.h

Common/Core/vtkIdListCollection.h

Common/Core/vtkInformation.h

Common/Core/vtkObjectFactory.h

Common/Core/vtkObjectFactoryCollection.h

Common/Core/vtkOutputWindow.h

Common/Core/vtkOverrideInformation.h

Common/Core/vtkOverrideInformationCollection.h

Common/DataModel/vtkAMRBox.h

Common/DataModel/vtkDataObject.h

Common/DataModel/vtkDataObjectCollection.h

Common/DataModel/vtkDataSet.h

Common/DataModel/vtkDataSetAttributes.h

Common/DataModel/vtkDataSetCollection.h

Common/DataModel/vtkImageData.h

Common/DataModel/vtkImplicitFunctionCollection.h