smbd: get rid of get_file_handle_for_metadata()

smbd: get rid of get_file_handle_for_metadata()

This also avoids triggering an assert in get_share_mode_lock(). We already have
a handle, use that one, no need to call get_file_handle_for_metadata().

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14907
RN: set_ea_dos_attribute() fallback calling get_file_handle_for_metadata() triggers locking.tdb assert

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Nov 16 18:51:15 UTC 2021 on sn-devel-184