vtkPythonContext2D: update to the new module system

Rendering/PythonContext2D/CMakeLists.txt

-set(module_SRCS
-  vtkPythonItem.cxx
-  )
+set(classes
+  vtkPythonItem)
 
-vtk_module_library(vtkPythonContext2D ${module_SRCS})
+vtk_module_add_module(VTK::PythonContext2D
+  CLASSES ${classes})

Rendering/PythonContext2D/Testing/CMakeLists.txt

+if (VTK_WRAP_PYTHON)
+  add_subdirectory(Python)
+endif ()

Rendering/PythonContext2D/module.cmake

-if (VTK_WRAP_PYTHON)
-  vtk_module(vtkPythonContext2D
-    GROUPS
-      StandAlone
-    COMPILE_DEPENDS
-      vtkPython
-    OPTIONAL_PYTHON_LINK
-    EXCLUDE_FROM_JAVA_WRAPPING
-    TEST_DEPENDS
-      vtkTestingCore
-    KIT
-      vtkWrapping
-    DEPENDS
-      vtkRenderingContext2D
-    PRIVATE_DEPENDS
-      vtkCommonCore
-      vtkWrappingPythonCore
-    )
-endif ()

Rendering/PythonContext2D/vtk.module

+NAME
+  VTK::PythonContext2D
+LIBRARY_NAME
+  vtkPythonContext2D
+CONDITION
+  VTK_WRAP_PYTHON
+GROUPS
+  StandAlone
+DEPENDS
+  VTK::RenderingContext2D
+PRIVATE_DEPENDS
+  VTK::CommonCore
+  VTK::WrappingPythonCore
+TEST_DEPENDS
+  VTK::TestingCore