Disable UNASSIGNED-CoreValidation-DevLimit-MissingQueryCount while the
Khronos issue is investigated.

Bug: angleproject:5148
Change-Id: If3cd4b028182a06411b928417e7c778ea02189d1
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2462075Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Tim Van Patten <timvp@google.com>