Lint

[ExecuTorch][WebGPU] Add 256-thread "steel" q4gsw prefill GEMM #77197

Job	Run time
link-check / lint-file-size	14s
link-check / lint-xrefs	12s
Get changed files / get-changed-files	2s
link-check / lint-urls	12s
lintrunner	46s
lintrunner-mypy	0s
	1m 26s

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