[3.8] bpo-38323: Skip SubprocessMultiLoopWatcherTest as they can hang the test suite (GH-26542)

[miss-islington]

(cherry picked from commit f171877)

Co-authored-by: Pablo Galindo [email protected]

https://bugs.python.org/issue38323

[miss-islington]

@pablogsal: Status check is done, and it's a success ✅ .

[miss-islington]

@pablogsal: Status check is done, and it's a success ✅ .

[miss-islington]

@pablogsal: Status check is done, and it's a success ✅ .

[miss-islington]

@pablogsal: Status check is done, and it's a success ✅ .

[vstinner]

Even if the 3.8 branch no longer accepts bugfixes, Refleak buildbot workers are still run on this branch: "scheduler: 3.8-daily". Example of job: aarch64 RHEL8 Refleaks 3.8.
https://buildbot.python.org/all/#/builders/225

I propose to backport the test_asyncio fix to prevent the test suite to hang randomly after 3 hours: https://bugs.python.org/issue38323

Maybe the buildbot configuration should be modified to no longer run the 3.8 branch. In this case, we don't need this backport (the hang is random and unlikely).

cc @ambv @pablogsal @zware

[ambv]

I am fine with this backport if it keeps 3.8 refleak tests running.