[WebGPU] A12x devices and earlier should use default limits
radar://128065020
Pull request: https://github.com/WebKit/WebKit/pull/28730
Committed 279016@main (a19c25f387d2): <https://commits.webkit.org/279016@main> Reviewed commits have been landed. Closing PR #28730 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/29359
Committed 279569@main (427a310bda2e): <https://commits.webkit.org/279569@main> Reviewed commits have been landed. Closing PR #29359 and removing active labels.