MAINT: restore npymath implementations needed for freebsd #22883
+446
−18
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Backport of #22882.
Closes #22850
FreeBSD is missing the long double variants of some complex geometric functions that should be mandatory in C11. Restore them from the removed code (taken from diffing to v1.23.5)
I tested this on a 1GB FreeBSD qemu image, and discovered there is a test that should be skipped on such a limited machine. With the skip the tests ran to completion, but there were a number of failures related to floating-point error reporting. It may be worth taking a look if we get FreeBSD CI going.