test/libcephfs: skip dirent inode check on Windows

test/libcephfs: skip dirent inode check on Windows

The LibCephFS.DirLs test calls ceph_readdirplus_r and expects
the returning dirent.d_ino value to match the ceph_statx.stx_ino
inode.

The issue is that on Windows, "dirent" uses long (4B) inodes, which
isn't large enough to hold the ceph inodes (uint64_t).

For now, we'll drop this specific assertion. On Windows, the
ceph_statx inode should be used instead of the dirent one.

Signed-off-by: Lucian Petrut <lpetrut@cloudbasesolutions.com>