DevTools: Disable ListControl test before changing subrepo

This CL disables a test that will be broken by the UI.ListControl
changes here [1] and fixed after that is merged here [2].

[1] https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/1880309
[2] https://chromium-review.googlesource.com/c/chromium/src/+/1690089

Bug: 963183
Change-Id: Ie74c350af90e55961d12c819fe9f37e1eb085584
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1881715Reviewed-by: Lorne Mitchell <lomitch@microsoft.com>
Commit-Queue: Jack Lynch <jalyn@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#722714}

third_party/blink/web_tests/TestExpectations

@@ -6202,3 +6202,6 @@ crbug.com/878878 [ Mac ] virtual/threaded/fast/scroll-snap/snaps-for-different-k
 
 crbug.com/878878 virtual/threaded/fast/scroll-snap/animate-fling-to-snap-points.html [ Failure Pass Timeout ]
 crbug.com/878878 virtual/threaded/fast/scroll-snap/snap-scrolls-visual-viewport.html [ Failure Pass ]
+
+# DevTools ListControl (disabled temporarily as part of workflow)
+crbug.com/963183 http/tests/devtools/unit/list-control-equal-height.js [ Skip  ]