Add telemetry for syscall mach and kernel MIG in Lockdown mode on iOS.
<rdar://problem/103301850>
Pull request: https://github.com/WebKit/WebKit/pull/7548
Committed 257846@main (6f3c84c00ec6): <https://commits.webkit.org/257846@main> Reviewed commits have been landed. Closing PR #7548 and removing active labels.