Our GN was using the incorrect path for the new test sets. This was
showing up as an isolate_tests failure when running the new tests.

Also fixes incorrect search paths for the case list directory when used
in a Chromium checkout. And adds a few other missing data dependencies.

Bug: angleproject:3353
Change-Id: I602db1e5debdad88b6eace76416fc2c10c059f8b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1616021Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>