vtkImagingStatistics: update to the new module system

Imaging/Statistics/CMakeLists.txt

-set(Module_SRCS
-  vtkImageAccumulate.cxx
-  vtkImageHistogram.cxx
-  vtkImageHistogramStatistics.cxx
-  )
+set(classes
+  vtkImageAccumulate
+  vtkImageHistogram
+  vtkImageHistogramStatistics)
 
-vtk_module_library(${vtk-module} ${Module_SRCS})
+vtk_module_add_module(VTK::ImagingStatistics
+  CLASSES ${classes})

Imaging/Statistics/module.cmake

-vtk_module(vtkImagingStatistics
-  GROUPS
-    Imaging
-    StandAlone
-  KIT
-    vtkImaging
-  DEPENDS
-    vtkCommonExecutionModel
-  PRIVATE_DEPENDS
-    vtkCommonCore
-    vtkCommonDataModel
-    vtkImagingCore
-  )
\ No newline at end of file

Imaging/Statistics/vtk.module

+NAME
+  VTK::ImagingStatistics
+LIBRARY_NAME
+  vtkImagingStatistics
+KIT
+  VTK::Imaging
+GROUPS
+  Imaging
+  StandAlone
+DEPENDS
+  VTK::CommonExecutionModel
+PRIVATE_DEPENDS
+  VTK::CommonCore
+  VTK::CommonDataModel
+  VTK::ImagingCore