[Subtask] Enhance the Filesystem::stat() functionality in gvfs-fuse to include the file type

[diqiu50]

Describe the subtask

Some object-based filesystems do not know whether a path is a file or a directory. Because of this, we need to try retrieving metadata as both a file and a directory. However, if we already have the file type, we can fetch the file’s metadata directly.

Parent issue

#5504