ggml webgpu: minor set rows optimization (llama/16810)

ggml webgpu: minor set rows optimization (llama/16810)

* Add buffer label and enable dawn-specific toggles to turn off some checks

* Minor set_rows optimization (ggml/4)

* updated optimization, fixed errors

* non vectorized version now dispatches one thread per element

* Simplify

* Change logic for set_rows pipelines

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Co-authored-by: Neha Abbas <redacted>
Co-authored-by: Neha Abbas <redacted>
Co-authored-by: Reese Levine <redacted>
* Comment on dawn toggles

* Remove some comments

* Implement overlap binary operators

* Revert "Implement overlap binary operators"

This reverts commit ed710b36f51ab3f53fa13db15c1685dc8678a32a.

* Disable support for non-contiguous binary_op tensors and leave note for future support

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Co-authored-by: neha-ha <redacted>
Co-authored-by: Neha Abbas <redacted>
Co-authored-by: Neha Abbas <redacted>