Add subinterpreter support #2379

Job	Run time
Build source distribution	9s
Decide which wheel types to build	4s
manylinux_aarch64 wheels	3m 46s
musllinux_x86_64 wheels	7m 40s
manylinux_aarch64 wheels	6m 4s
manylinux_x86_64 wheels	6m 10s
manylinux_x86_64 wheels	3m 2s
musllinux_x86_64 wheels	3m 46s
test_in_alpine	45s
test_attaching_to_uv_interpreters (3.13)	43s
test_wheels_in_arch	50s
test_wheels_in_debian	1m 2s
test_aarch64_wheels (3.9)	1m 13s
test_attaching_to_eol_interpreters (3.7)	1m 20s
test_wheels_in_fedora	1m 0s
test_aarch64_wheels (3.15)	1m 14s
test_aarch64_wheels (3.13)	1m 14s
test_aarch64_wheels (3.14)	1m 15s
test_attaching_to_eol_interpreters (2.7)	1m 6s
test_free_threading (3.15)	2m 21s
test_wheels (3.9)	1m 20s
test_wheels (3.13)	1m 9s
test_free_threading (3.13)	2m 0s
test_free_threading (3.14)	1m 42s
test_wheels (3.14)	1m 11s
test_wheels (3.10)	1m 11s
test_wheels (3.11)	4m 21s
test_wheels (3.15)	1m 3s
test_wheels (3.12)	1m 17s
test_wheels (3.14t)	2m 40s
test_wheels (3.15t)	2m 31s
test_wheels (3.13t)	2m 36s
upload_pypi	1s
	1h 7m 46s

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