There is no change in behavior. This just helps prepare for the
transition from the boost::filesystem to the std::filesystem path
implementation.
Co-authored-by: Kiminuo <kiminuo@protonmail.com>
This is a backport of core#22937 [1/2]
https://github.com/bitcoin/bitcoin/pull/22937/commits/b39a477ec69a51b2016d3a8c70c0c77670f87f2b