Foreground tasks that repost themselves can force the draining loop
to run indefinitely long without giving other tasks chance to run.
This limits the foreground task draining loop to run only the tasks
that were in the tasks queue at the beginning of the loop.
PR-URL: https://github.com/nodejs/node/pull/19987
Fixes: https://github.com/nodejs/node/issues/19937
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yang Guo <yangguo@chromium.org>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
