Intent to prototype and ship: AbortSignal.any

[Vincent Hilla]

As of Fx124 I intend to turn AbortSignal.any on by default.

Summary: AbortSignals are useful for aborting async operations. This API allows combining multiple signals into a new signal which is aborted when any of the source signals is aborted.

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1830781

Specification: https://github.com/whatwg/dom/pull/1152 and https://dom.spec.whatwg.org/#create-a-dependent-abort-signal 

Standards Body: WHATWG

Platform coverage: all

DevTools Bug: n/a

Link to standards-position discussion: https://github.com/mozilla/standards-positions/issues/774 

Other browsers: Shipped in Blink, shipping in WebKit

Web-platform-tests: https://wpt.fyi/results/dom/abort/abort-signal-any.any.html