258266@main simplified INSTALL_PATH for LayoutTestHelper under the assumption that it's only installed on macOS. But the Xcode project itself overrode SKIP_INSTALL, despite what the xcconfig said. This effectively reverts this part of the change, also removing the project override.
<rdar://problem/103784296>
Pull request: https://github.com/WebKit/WebKit/pull/8110
Committed 258365@main (e961efa584fb): <https://commits.webkit.org/258365@main> Reviewed commits have been landed. Closing PR #8110 and removing active labels.