Add syscall telemetry in the WebContent process to detect which syscalls are no longer used.
<rdar://problem/115788718>
Pull request: https://github.com/WebKit/WebKit/pull/17975
Committed 268219@main (1d7dbd74077b): <https://commits.webkit.org/268219@main> Reviewed commits have been landed. Closing PR #17975 and removing active labels.