fix(DB/loot): Dalaran Miner and Brewmaster drops (#6178)

Dalaran Miner and Brewmaster were dropping certain items related to their
professions with 100% probability. According to classic wowhead drop
tables, this is not right.

- Closes #6154
- Closes chromiecraft/chromiecraft#747

data/sql/updates/pending_db_world/rev_1622560225187552441.sql

@@ -0,0 +1,5 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1622560225187552441');
+
+SET @DALARAN_BREWMASTER = 3577;
+SET @DALARAN_MINER = 3578;
+DELETE FROM `creature_loot_template` WHERE `Entry` IN (@DALARAN_BREWMASTER, @DALARAN_MINER) AND `Chance` = 100;