Add sandbox telemetry for CARenderServer in the WebContent process on iOS.
<rdar://problem/106755565>
Pull request: https://github.com/WebKit/WebKit/pull/11556
Committed 261716@main (3f2941f6314c): <https://commits.webkit.org/261716@main> Reviewed commits have been landed. Closing PR #11556 and removing active labels.