webnn: Migrate argMinMax validation tests to WPTs
This CL adds WPT tests for argMinMax and removes the unit tests
MLGraphBuilderTest.ArgMinMaxTest and MLGraphTestMojo.ArgMinMaxTest.
Bug: 327337526, 328026885
Change-Id: I8fcce0db9e4b1673e721baf0b7abdfe3a06bdf2b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5547296
Reviewed-by: Austin Sullivan asully@chromium.org
Commit-Queue: Shanxing Mei shanxing.mei@intel.com
Reviewed-by: ningxin hu ningxin.hu@intel.com
Cr-Commit-Position: refs/heads/main@{#1307229}