webnn: Enforce input data type constraints for gemm and matmul
As specified in webmachinelearning/webnn#646
Bug: 328567884
Change-Id: Ia55a214e7ad281ec3c8911e9116f388fac209d05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5495161
Auto-Submit: Shiyi Zou shiyi.zou@intel.com
Commit-Queue: Shiyi Zou shiyi.zou@intel.com
Reviewed-by: Austin Sullivan asully@chromium.org
Reviewed-by: ningxin hu ningxin.hu@intel.com
Cr-Commit-Position: refs/heads/main@{#1294123}