fix(DB/creature): Beaten Corpse faction and flags (#6319)

Beaten Corpse (guid: 19221) was assigned the wrong faction and flags
which made its nameplate appear grey instead of green for Horde players

- Closes #6318
- Closes https://github.com/chromiecraft/chromiecraft/issues/841

data/sql/updates/pending_db_world/rev_1623425075618562613.sql

@@ -0,0 +1,3 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1623425075618562613');
+
+UPDATE `creature_template` SET `dynamicflags` = 0 WHERE `entry` = 10668;