[Sheriff] Update TestExpectations

Mark external/wpt/IndexedDB/interleaved-cursors-large.html as
flaky in all platforms. It has timed out flakily on Linux, Mac
and Windows.

Bug: 937170
Change-Id: I2cc24afad7248af00fe2d9a5b787a369d1d6b13a
TBR: pwnall@chromium.org
No-Try: True
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1943245Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720240}

third_party/blink/web_tests/TestExpectations

@@ -5379,7 +5379,7 @@ crbug.com/867532 [ Linux ] external/wpt/workers/modules/dedicated-worker-import.
 crbug.com/865432 [ Linux ] virtual/omt-worker-fetch/external/wpt/workers/modules/dedicated-worker-import-blob-url.any.worker.html [ Timeout Pass ]
 crbug.com/867532 [ Linux ] virtual/omt-worker-fetch/external/wpt/workers/modules/dedicated-worker-import-data-url.any.worker.html [ Timeout Pass ]
 crbug.com/867532 [ Linux ] virtual/omt-worker-fetch/external/wpt/workers/modules/dedicated-worker-import.any.worker.html [ Timeout Pass ]
-crbug.com/937170 [ Linux Win7 ] external/wpt/IndexedDB/interleaved-cursors-large.html [ Pass Timeout ]
+crbug.com/937170 external/wpt/IndexedDB/interleaved-cursors-large.html [ Pass Timeout ]
 crbug.com/937991 [ Win7 Release ] http/tests/devtools/cache-storage/cache-data.js [ Pass Timeout ]
 
 # These video tests seem to take a screenshot too early.