create_vsimemfile windows fatal exception

[jakimowb]

running create_vsimemfile can lead to windows fatal exceptions.
observed in:

• conda with gdal 3.9

Thread 0x00004820 (most recent call first):
  File "D:\Repositories\qgispluginsupport\qps\fieldvalueconverter.py", line 24 in create_vsimemfile
  File "D:\Repositories\qgispluginsupport\tests\test_genericfieldvalueconverter.py", line 45 in test_create_vsimemfile
  File "D:\Miniforge3\envs\qgis_minimum\lib\unittest\case.py", line 549 in _callTestMethod
  File "D:\Miniforge3\envs\qgis_minimum\lib\unittest\case.py", line 591 in run
  File "D:\Miniforge3\envs\qgis_minimum\lib\unittest\case.py", line 650 in __call__
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\_pytest\unittest.py", line 351 in runtest
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\_pytest\runner.py", line 178 in pytest_runtest_call
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\pluggy\_callers.py", line 121 in _multicall
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\pluggy\_manager.py", line 120 in _hookexec
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\pluggy\_hooks.py", line 512 in __call__
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\_pytest\runner.py", line 246 in <lambda>
  File "D:\Miniforge3\envs\qgis_minimum\lib\site-packages\_pytest\runner.py", line 344 in from_call

call:
pytest tests/test_genericfieldvalueconverter.py::GenericFieldValueConverterTests::test_create_vsimemfile