[zip] Re-enable ZipTest.BigFile on ChromeOS

From the flakiness dashboard [1], there didn't seem to be any flakiness
on the remaining ChromeOS bots that were still running this test before
it got disabled.

Let's try to re-enable it and monitor the situation.

[1] https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=zlib_unittests&tests=ZipTest.BigFile

This reverts commit 76d608ed096266c426e0a93ca5b8a85ab77aad72.

Original change's description:
> sheriff: Disable ZipTest.BigFile on CrOS due to flakiness
>
> Bug: 1300448
> Change-Id: I0780ceb9150f1c59cb7b801f57431b8ead6cfe7a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3489577
> Owners-Override: Yuki Shiino <yukishiino@chromium.org>
> Reviewed-by: Kentaro Hara <haraken@chromium.org>
> Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#975040}

Bug: 1300448, 1299736, 1298347
Change-Id: Iacd23467b70a77501bb439c49be96541a13b81f9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3496442
Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: François Degros <fdegros@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/main@{#976021}
NOKEYCHECK=True
GitOrigin-RevId: 68971e57405f9b06b08fc191c66dac555ee44a00
1 file changed