Merge topic 'libuv-macos-kqueue' into release-3.30

422c1de564 libuv: macos: restore use of kqueue instead of posix poll
7e3519e705 libuv: macos: reap child processes more reliably when using kqueue

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !9619