tweak the logic for LoadLibraryEx() calls following ctypes #300

Job	Run time
make_linux_matrix	3s
make_macos_matrix	3s
make_windows_matrix	3s
python_sdist	13s
macos (cp313-macosx_x86_64, macos-13)	7m 49s
windows (cp313-win_amd64)	1m 4s
macos (cp313-macosx_arm64, 11.0, arch -arm64 bash --noprofile --norc -eo pipefail {0})	3m 39s
linux (cp313-manylinux_x86_64)	5m 9s
linux (cp313t-manylinux_x86_64, true)	5m 23s
linux (cp313-musllinux_x86_64)	4m 48s
merge_artifacts	2s
check	3s
	28m 19s

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