perf: Speedup other file ops on Windows

[adskWangl]

Description

Similar to #4977, replace std::filesystem with Windows APIs for better performance.

Tests

No new test.

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[lgritz]

Can I ask a naive question? Is the implementation of these std::filesystem functions on Windows not equivalent to what you wrote? Why are they so slow in the std library as provided by MSVS?

[adskWangl]

Can I ask a naive question? Is the implementation of these std::filesystem functions on Windows not equivalent to what you wrote? Why are they so slow in the std library as provided by MSVC?

Functionally these changes can achieve what we expect from is_directory/is_regular/file_size (e.g. see file_status::_Refresh), while MS STL's implementation does contain more processing. The slowdown shares the same reason as stated in #4977, all of them fall in _std_fs_get_stats through _Status.type(), which is slow if the argument is a netwok path.

[lgritz]

LGTM

[lgritz]

The CI failure appears unrelated, I will merge as soon as the Windows job completes.