[WebGPU] GPUCanvasContext backing creation will fail if requested size exceeds max 2D texture size
<rdar://problem/119197653>
Pull request: https://github.com/WebKit/WebKit/pull/21343
Committed 271616@main (baa2edb1774a): <https://commits.webkit.org/271616@main> Reviewed commits have been landed. Closing PR #21343 and removing active labels.