[WebGPU] Replace asynchronous .requestAdapterInfo() with synchronous .info Recent spec change, per https://github.com/gpuweb/gpuweb/pull/4662
<rdar://problem/128896785>
Pull request: https://github.com/WebKit/WebKit/pull/29191
Committed 279461@main (47fff30b64ba): <https://commits.webkit.org/279461@main> Reviewed commits have been landed. Closing PR #29191 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/29285
Pull request: https://github.com/WebKit/WebKit/pull/29287
Committed 279516@main (2228e1db0bd9): <https://commits.webkit.org/279516@main> Reviewed commits have been landed. Closing PR #29287 and removing active labels.