python3: Fix tests like "test_loads_recursion" failing on windows
python3: Fix tests like "test_loads_recursion" failing on windows

This commit associates stack size of 2000000 with python executable
and fixes marshall tests like "test_loads_2x_code", "test_loads_recursion"
and "test_recursion_limit".

It is equivalent to the "StackReserveSize" property set in "python.vcxproj"

adrianbroher/python-cmake-buildsystem,davidsansome/python-cmake-buildsystem,jcfr/python-cmake-buildsystem,thewtex/python-cmake-buildsystem,thewtex/python-cmake-buildsystem,python-cmake-buildsystem/python-cmake-buildsystem