Revert "Revert "[lldb][modules] Disable Clang Modules in source/Host directory on macOS""

This reverts commit c7bd61d4a79b88dbd97028bb0a73a73b2d6aca89 because it
breaks the underlying issue is apparently not yet resolved. This only
affects the modules build.

GitOrigin-RevId: 9ffcc85fbe52b4480a82749e58b19c3ea5be5e99
1 file changed