Review MAX_PATH usage

It looks like since Windows 10, version 1607, paths can be longer, check the documentation (and the app manifest can enable the long path usage):

https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#enable-long-paths-in-windows-10-version-1607-and-later

No repository file or test is named. Start with a repository-wide search for MAX_PATH and inspect the app manifest, then compare the findings with the linked Windows long-path documentation. Done means the affected usage and manifest behavior have been reviewed and any required follow-up is clearly identified.

Written by the indexing model from the issue text.