Adjust priority of thread that opens a trustd connections to avoid the main thread waiting for a lower priority thread.
<rdar://problem/109100772>
Pull request: https://github.com/WebKit/WebKit/pull/13642
Committed 263869@main (b651702bdbe9): <https://commits.webkit.org/263869@main> Reviewed commits have been landed. Closing PR #13642 and removing active labels.