Windows: Directory removal sometimes fails

On Windows, removing a directory recursively with cmake -E remove_directory or file(REMOVE_RECURSE) occasionally fails for a few reasons:

Races with anti-virus tools locking recently created files.
Races with other tools creating new entries in a directory.
Races between removing all entries in a directory and removing the directory itself. NTFS deletion is not synchronous.

Our implementation currently uses KWSys SystemTools::RemoveADirectory. It could be improved with a more robust removal approach.

Meanwhile some code paths are using cmSystemTools::RepeatedRemoveDirectory to work around this.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information