… GC (#34516)

## Summary

Adds a regression test that mirrors the report in #29075: take
`AbortSignal.any()` of an `AbortController`-backed signal, register
an `"abort"` listener on the returned temporary, force a major GC,
then abort the controller and assert the listener fires.

Per the spec

([abort-signal-garbage-collection](https://dom.spec.whatwg.org/#abort-signal-garbage-collection)),
a non-aborted dependent `AbortSignal` must not be GC'd while its
source signals set is non-empty and it has registered listeners for
the `abort` event. The fix landed in #34061 — `addEventListener` now
pins the dependent into every source signal's `activeDependents`
set (not just timer sources). Without that pin, the temporary
returned from `AbortSignal.any([ac.signal])` is only referenced via
`WeakRef` from `ac.signal`'s `dependentSignals`, so V8 collects it
and the listener silently disappears.

The existing regression test
(`tests/specs/run/abort_signal_any_gc`) only exercises the
timer-source path: it includes `AbortSignal.timeout(500)` in the
source list, which the partial fix in #32118 already covered. This
new test exercises the controller-only path that the issue
reported.

Verified the test:
- prints `Aborted` and passes on builds containing #34061
  (locally-built `main` and canary `c39514d10a`+)
- produces no output and would fail the assertion on Deno 2.7.14 and
  earlier (only the timer-source pinning was in place)

## Test plan

- [ ] `cargo test --test specs -- abort_signal_any_controller_gc`
- [ ] Existing `cargo test --test specs -- abort_signal_any_gc` still
passes
- [ ] WPT `AbortSignal.any.html` continues to pass

Closes denoland/orchid#260

Co-authored-by: divybot <[email protected]>
Co-authored-by: Divy Srivastava <[email protected]>

… GC (denoland#34516)

## Summary

Adds a regression test that mirrors the report in denoland#29075: take
`AbortSignal.any()` of an `AbortController`-backed signal, register
an `"abort"` listener on the returned temporary, force a major GC,
then abort the controller and assert the listener fires.

Per the spec

([abort-signal-garbage-collection](https://dom.spec.whatwg.org/#abort-signal-garbage-collection)),
a non-aborted dependent `AbortSignal` must not be GC'd while its
source signals set is non-empty and it has registered listeners for
the `abort` event. The fix landed in denoland#34061 — `addEventListener` now
pins the dependent into every source signal's `activeDependents`
set (not just timer sources). Without that pin, the temporary
returned from `AbortSignal.any([ac.signal])` is only referenced via
`WeakRef` from `ac.signal`'s `dependentSignals`, so V8 collects it
and the listener silently disappears.

The existing regression test
(`tests/specs/run/abort_signal_any_gc`) only exercises the
timer-source path: it includes `AbortSignal.timeout(500)` in the
source list, which the partial fix in denoland#32118 already covered. This
new test exercises the controller-only path that the issue
reported.

Verified the test:
- prints `Aborted` and passes on builds containing denoland#34061
  (locally-built `main` and canary `c39514d10a`+)
- produces no output and would fail the assertion on Deno 2.7.14 and
  earlier (only the timer-source pinning was in place)

## Test plan

- [ ] `cargo test --test specs -- abort_signal_any_controller_gc`
- [ ] Existing `cargo test --test specs -- abort_signal_any_gc` still
passes
- [ ] WPT `AbortSignal.any.html` continues to pass

Closes denoland/orchid#260

Co-authored-by: divybot <[email protected]>
Co-authored-by: Divy Srivastava <[email protected]>