[Bug]: tests/page/workers.spec.ts:240:3 › should support extra http headers is flaky

[mxschmitt]

Tracking issue for #35444

Upstream bug: https://issues.chromium.org/u/1/issues/407795731
Related CL https://chromium-review.googlesource.com/c/chromium/src/+/6665217

[dgozman]

Upstream change for Inspector.workerScriptLoaded event:
https://chromium-review.googlesource.com/c/chromium/src/+/7016867
https://chromium-review.googlesource.com/c/chromium/src/+/7048398.