Timeout diagnostics lose the promise a hung test awaits once it is garbage-collected #217

Describe the bug

When a test or a beforeAll / afterAll hook times out, its error lists the promises it created that are still pending. Since #143 the tracker drops a promise's record as soon as a FinalizationRegistry reports the promise collected. A promise nobody can resolve, await new Promise(() => {}) being the usual cause of a hang, is unreachable while the test waits on it, so a garbage collection inside the timeout window removes the one record the diagnostics exist to show.

runner-context.test.ts's two timeout cases assert that record, and they fail at random:

-         "items": ArrayContaining [
-           ObjectContaining {
-             "stack": StringContaining "Promise created",
-           },
-         ],
+         "items": [],

On a Windows host runner-context.test.ts failed 2 of 12 runs of main this way.

I have a fix that keeps the record of a collected promise while the test or hook that created it can still time out, and releases it when that window closes. I can open a PR.

System Info

System:
  OS: Windows 11 10.0.26200
Binaries:
  Node: 26.8.1

React Native Harness Version

1.6.0 (main at bca0781)

Reproduction

https://github.com/callstackincubator/react-native-harness/blob/main/packages/runtime/src/__tests__/runner-context.test.ts

Steps to reproduce

1. Run pnpm exec vitest run src/__tests__/runner-context.test.ts in packages/runtime a few times.
2. "fails the suite when beforeAll times out and skips its tests" or "fails the timed-out test and skips the rest of the file" fails now and then with "items": [].