Simplify tests, shorten buildir name on windows #433

Job	Run time
make_macos_matrix	4s
python_sdist	10s
clang_TSAN	4m 34s
make_windows_matrix	4s
make_linux_matrix	4s
make_run_parallel_matrix	6s
pytest-run-parallel (macos-latest, 3.14t-dev)	4m 43s
pytest-run-parallel (windows-latest, 3.14t-dev)	1m 37s
pytest-run-parallel (ubuntu-latest, 3.14t-dev)	4m 6s
macos (cp314-macosx_x86_64, macos-13)	8m 18s
macos (cp314t-macosx_x86_64, macos-13)	8m 31s
macos (cp314t-macosx_arm64, 11.0, arch -arm64 bash --noprofile --norc -eo pipefail {0})	4m 9s
macos (cp314-macosx_arm64, 11.0, arch -arm64 bash --noprofile --norc -eo pipefail {0})	4m 24s
windows (cp314t-win32)	25m 29s
windows (cp314-win_amd64)	23m 25s
windows (cp314t-win_amd64)	23m 25s
windows (cp314-win32)	24m 36s
windows (cp314-win_arm64, windows-11-arm)	36m 36s
linux (cp314-manylinux_x86_64, x86_64)	4m 29s
windows (cp314t-win_arm64, windows-11-arm)	46m 35s
linux (cp313-manylinux_i686, i686)	4m 52s
linux (cp314-manylinux_aarch64, aarch64)	4m 30s
linux (cp314t-manylinux_x86_64, x86_64)	4m 41s
linux (cp314-musllinux_x86_64, x86_64)	5m 38s
linux (cp314t-manylinux_aarch64, aarch64)	4m 30s
linux (cp314t-musllinux_aarch64, aarch64)	4m 43s
linux (cp39-manylinux_aarch64, aarch64)	4m 11s
linux (cp314t-musllinux_x86_64, x86_64)	5m 23s
linux (cp311-musllinux_i686, i686)	4m 45s
linux (cp314-musllinux_aarch64, aarch64)	4m 19s
merge_artifacts	2s
check	3s
	4h 33m 2s

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