merge_pr_48593

webnn: Support gather nd in tflite converter

Implement WebNN gather_nd operation with TFLite GATHER_ND builtin
operator.

Refine clamp operation with the min and max for unsupported range.

Bug: 40206287
Change-Id: I2a332e93dc712676a06636b1cb8be4fa4fbc8eed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5925040
Reviewed-by: ningxin hu [email protected]
Reviewed-by: Austin Sullivan [email protected]
Commit-Queue: Junwei Fu [email protected]
Cr-Commit-Position: refs/heads/main@{#1368689}