The GitHub Actions runners look like they're only 1 year away from the
last macOS x86_64 platform being removed. Get ahead of the game and
build x86_64 on arm64.
Homebrew binaries are always compiled for exactly the version they're
installed on making them very un-portable. When a wheel is "repaired" by
cibuildwheel, delocate-wheel pulls in _psycopg's dependencies
(libpq.dylib, libssl.dylib and libcrypto.dylib) which, on a GitHub
Actions macOS 14 runner, are provided by Homebrew and are therefore only
macOS >= 14 compatible. The resultant wheel is therefore incompatible
with all but the latest macOS versions.
Build all dependencies from source so that we can set the deployment
target to something sensible. Fixes#1753.
The manylinux_2_24 tag leaves too many users without usable packages.
Using this tag requires to build libraries too or a libssh too old will
be used, with the segfault risks seen in the past.
OTOH building all the libraries on arm/ppc platforms proves very time
consuming and requires further tooling than what available in the image.
Because these packages are new it seems ok to use the manylinux_2_24
tag and use the package versions of libpq/libssl.
