This allows us to get further into building FoundationEssentials once
again on Windows. Much of the file system work has resulted in this
module no longer being viable on Windows and will need to be replaced to
allow building on Windows which does not have the `fts` APIs.
* (123102499) Swift implementation of setAttributes:forItemAtPath: is slower than the old ObjC implementation
* Move relevant key list to static array
* Fix build failure