webnn: Migrate expand validation tests to WPTs
This CL adds WPT tests for reshape and removes the unit tests
MLGraphBuilderTest.ExpandTest and MLGraphTestMojo.ExpandTest.
Bug: 327337526, 328026885
Change-Id: Ic14bb6ba6b50ff7b83d1f4cf11c6327a2d2594c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5470844
Commit-Queue: Shanxing Mei shanxing.mei@intel.com
Reviewed-by: Austin Sullivan asully@chromium.org
Reviewed-by: ningxin hu ningxin.hu@intel.com
Cr-Commit-Position: refs/heads/main@{#1293438}