Bumps the github-actions group with 1 update: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 8.0.0 to 8.0.1
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@70fc10c...3e5f45b)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 8.0.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

…ub-actions-1fa769d870

Bump actions/download-artifact from 8.0.0 to 8.0.1 in the github-actions group

in madler/zlib@81cc0bebe, zlib started using EWOULDBLOCK,
which when `-D_POSIX_SOURCE` is set, FreeBSD would hide
`#define EWOULDBLOCK EAGAIN`.
See <https://github.com/freebsd/freebsd-src/blob/3e9f4fd6fc50300d052d5619d82a14d3488483d5/sys/sys/errno.h#L92-L93>

However,
`_POSIX_SOURCE` isn't really set in `./configure` or `CMakeLists.txt`.
We should follow whatever upstream native build does,
rather than do our own way.
Along with `_POSIX_SOURCE`,
`_C99_SOURCE` (apple), `_XOPEN_SOURCE` (solaris) are removed aslo.

This was found in

* <rust-lang/rust#154734>
* <https://triage.rust-lang.org/gha-logs/rust-lang/rust/69786578177>

The rust-lang/rust try-build suceeded with a couple of tier 2 platforms:
<rust-lang/rust#154734 (comment)>

* dist-powerpc-linux
* dist-riscv64-linux
* dist-s390x-linux
* dist-sparcv9-solaris
* dist-x86_64-apple
* dist-x86_64-illumos
* dist-x86_64-netbsd
* dist-x86_64-solaris
* x86_64-freebsd

fix(zlib): remove unnecessary defines