In the ntdll file handling code, there are currently two duplicated file info setting functions: `get_file_info` and `fd_get_file_info`. One pasted on path strings, and the other based on file descriptors respectively. This patch set simplifies the code by unifying both functions into a single function ~~powered by `fstatat` instead of `lstat` and `fstat`~~.
-- v2: ntdll: Unify get_file_info and fd_get_file_info.