tests

Set `Py_GIL_DISABLED=1` for free threaded Python on Windows #1194

Job	Run time
test_cygwin (39, windows-latest)	4m 46s
ci_setuptools (3.10, ubuntu-latest)	4m 8s
test (3.9, ubuntu-latest)	1m 9s
collateral (diffcov)	1m 36s
test (3.9, macos-latest)	1m 32s
collateral (docs)	26s
test_msvc_python_mingw	3m 7s
test (3.9, windows-latest)	1m 19s
test_msys2_mingw (mingw64, x86_64, gcc, g++)	1m 51s
test (3.13, ubuntu-latest)	1m 27s
test_msys2_mingw (mingw32, i686, gcc, g++)	2m 18s
test (3.13, macos-latest)	1m 24s
test_msys2_mingw (ucrt64, ucrt-x86_64, gcc, g++)	2m 1s
test (3.13, windows-latest)	1m 13s
test_msys2_mingw (clang64, clang-x86_64, clang, clang++)	2m 13s
test (3.10, ubuntu-latest)	1m 25s
test (3.11, ubuntu-latest)	1m 12s
test (3.12, ubuntu-latest)	1m 26s
test (3.14, ubuntu-latest)	1m 27s
test (pypy3.10, ubuntu-latest)	1m 25s
check	6s
release	0s
	37m 31s

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