Add subinterpreter support #2382

Job	Run time
Decide which wheel types to build	3s
Build source distribution	11s
musllinux_x86_64 wheels	7m 40s
manylinux_x86_64 wheels	7m 13s
manylinux_aarch64 wheels	5m 51s
musllinux_x86_64 wheels	3m 42s
manylinux_aarch64 wheels	4m 7s
manylinux_x86_64 wheels	2m 41s
test_wheels_in_debian	55s
test_attaching_to_eol_interpreters (3.7)	1m 17s
test_in_alpine	42s
test_attaching_to_uv_interpreters (3.13)	35s
test_attaching_to_eol_interpreters (2.7)	1m 6s
test_free_threading (3.13)	2m 7s
test_wheels_in_fedora	1m 8s
test_wheels_in_arch	43s
test_free_threading (3.14)	1m 52s
test_free_threading (3.15)	2m 11s
test_aarch64_wheels (3.15)	1m 13s
test_aarch64_wheels (3.9)	1m 32s
test_aarch64_wheels (3.14)	1m 7s
test_aarch64_wheels (3.13)	1m 24s
test_wheels (3.10)	59s
test_wheels (3.12)	1m 8s
test_wheels (3.15)	1m 50s
test_wheels (3.13)	55s
test_wheels (3.14t)	2m 28s
test_wheels (3.11)	1m 11s
test_wheels (3.15t)	2m 12s
test_wheels (3.14)	1m 7s
test_wheels (3.13t)	2m 24s
test_wheels (3.9)	57s
upload_pypi	0s
	1h 4m 31s

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