Changing CMake file so that test_class_sh_module_local.py actually runs.

tests/CMakeLists.txt

@@ -164,6 +164,8 @@ if(PYBIND11_CUDA_TESTS)
 endif()
 
 string(REPLACE ".cpp" ".py" PYBIND11_PYTEST_FILES "${PYBIND11_TEST_FILES}")
+list(APPEND PYBIND11_PYTEST_FILES test_class_sh_module_local.py)
+list(SORT PYBIND11_PYTEST_FILES COMPARE NATURAL)
 
 # Contains the set of test files that require pybind11_cross_module_tests to be
 # built; if none of these are built (i.e. because TEST_OVERRIDE is used and