test: test-inspector-async-hook-setup-at-signal flag as flaky

[refack]

test-inspector-async-hook-setup-at-signal is also flaky on VS2017

Refs: #16771

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

Affected core subsystem(s)

test,inspector,windows

[refack]

Request to fast track. CI gives false negatives, and we are tracking the underlying issue in https://github.com/nodejs/node/projects/8

[gireeshpunathil]

Fast-tracking based on @refack 's request. We have seen this test causing random CI failures so makes sense to isolate before diagnosing

[gireeshpunathil]

Landed in 074a5c7 , don't know why the commit is not appearing here!

[gireeshpunathil]

ah, ok - the commit meta is missing! any clues what is the best way to fix it now?

[targos]

you can add the metadata as a comment at 074a5c7. It's too late to force-push.

[gireeshpunathil]

thanks @targos , done.

[MylesBorins]

@refack you landed this on 8.x-staging. Current process only allows for the backporting team to land on LTS branches

edit: my apologies, looking at commit data it was not landed by you... sorry about that

whoever landed it, please avoid landing things on 8.x-staging or 6.x-staging