Rename SecurityOrigin::passesFileCheck to SecurityOrigin::hasLocalUnseparatedPath to better reflect the functionality
<rdar://problem/128554006>
Pull request: https://github.com/WebKit/WebKit/pull/28933
Committed 279287@main (d21d6c8a867c): <https://commits.webkit.org/279287@main> Reviewed commits have been landed. Closing PR #28933 and removing active labels.