[#1649] cli: Add option to print attributes in list-objects

Define `--with-attr` flag of `container list-objects` which makes the
command to request and print user attributes for each object from the
container.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-cli/modules/session/util.go

@@ -41,6 +41,7 @@ func Prepare(cmd *cobra.Command, cnr cid.ID, obj *oid.ID, key *ecdsa.PrivateKey,
 	}
 
 	for i := range prms {
+		tok := tok
 		switch prms[i].(type) {
 		case *internalclient.GetObjectPrm:
 			tok.ForVerb(session.VerbObjectGet)