WebNN: implement cumulativeSum for DirectML backend
This CL implements cumulativeSum for DirectML backend.
This CL also adds some WPT conformance tests 1 to verify the
implementation.
Bug: 40206287
Change-Id: Id49674a854ee37240a593a4882893e75b0950a8f
Cq-Include-Trybots: luci.chromium.try:win11-blink-rel, mac14.arm64-blink-rel, mac14-blink-rel, mac15.arm64-blink-rel, mac15-blink-rel, linux-blink-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5850648
Commit-Queue: Bin Miao bin.miao@intel.com
Reviewed-by: ningxin hu ningxin.hu@intel.com
Reviewed-by: Weizhong Xia weizhong@google.com
Cr-Commit-Position: refs/heads/main@{#1359137}