Now that GPUQueue.writeBuffer passes the CTS, we can update the samples to use the simplified and correct version of the API.
<rdar://problem/106888396>
Pull request: https://github.com/WebKit/WebKit/pull/11561
Pull request: https://github.com/WebKit/WebKit/pull/11675
Committed 261875@main (3a4945ba8a14): <https://commits.webkit.org/261875@main> Reviewed commits have been landed. Closing PR #11675 and removing active labels.