MDEV-22770 trx_undo_report_rename() fails to release page latches

commit f74023b9 (MDEV-15090)
inadvertently removed a mtr_t::commit() call from
trx_undo_report_rename(), causing an InnoDB hang if
we failed to log a RENAME operation.

It is unclear whether this condition is possible in practice.
The test case involved SET GLOBAL innodb_trx_rseg_n_slots_debug=1
and a failed CREATE TABLE...SELECT, whose error handling would
internally invoke RENAME in InnoDB.

storage/innobase/trx/trx0rec.cc

@@ -1934,10 +1934,9 @@ dberr_t trx_undo_report_rename(trx_t* trx, const dict_table_t* table)
 				}
 			}
 		}
-
-		mtr.commit();
 	}
 
+	mtr.commit();
 	return err;
 }