Temporarily disable network data grid tests
Temporarily disable network data grid tests

This test is particularly flaky on Windows:
https://ci.chromium.org/p/devtools-frontend/builders/try/devtools_frontend_win64_rel

Previous attempts were unsuccesful at figuring out why it is flaky,
so we have to disable it for now to prevent blocking CL submissions.

TBR=aerotwist@chromium.org

Bug: 1066813
Change-Id: I1ff7007803caf6c4eaa8bc0eec69c6a182a79781
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2157043
Reviewed-by: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>
Commit-Queue: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>

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