Re-enable zlib-ng on all platforms (except s390x, PowerPC, and FreeBSD) (#10370)
PowerPC seems to build without errors if we upgrade `zlib-ng`, but
upgrading `zlib-ng` causes Windows to break
(https://github.com/rust-lang/libz-sys/issues/225), and Cargo doesn't
let us include two different versions.
s390x fails because it can't find `stfle`. It's possible that we could
fix this by by upgrading our manylinux version and/or by upgrading GCC
(which may necessitate upgrading our manylinux version), but I don't
know if it's fixable without one of those things? And it's not worth
bumping compatibility for that reason. \cc @konstin
uv
2ae0ed3b - Re-enable zlib-ng on all platforms (except s390x, PowerPC, and FreeBSD) (#10370)
