Block the CA render server on macOS when unified PDF is enabled.
<rdar://problem/114834122>
Pull request: https://github.com/WebKit/WebKit/pull/24395
Committed 274639@main (c1b66e4ec0ee): <https://commits.webkit.org/274639@main> Reviewed commits have been landed. Closing PR #24395 and removing active labels.
Re-opened since this is blocked by bug 269511
Pull request: https://github.com/WebKit/WebKit/pull/24560
Committed 274819@main (d325632c307d): <https://commits.webkit.org/274819@main> Reviewed commits have been landed. Closing PR #24560 and removing active labels.