test imported/w3c/web-platform-tests/webrtc-stats/supported-stats.https.html added in bug 262881 takes a very long time to compute and timeout from time to time
<rdar://problem/116833863>
Test gardening commit 273685@main (9e51eb3bbb10): <https://commits.webkit.org/273685@main> Reviewed commits have been landed. Closing PR #23455 and removing active labels.