DB/Loot: Clam Meat/Pearl loot table adjustments

Closes #22128

(cherry picked from commit 9d845340db3be85b65f16bb4ce9a533d481a1c32)

sql/updates/world/master/2021_10_13_05_world_2018_07_10_08_world_335.sql

@@ -0,0 +1,46 @@
+-- 
+-- Undo giant clam meat
+DELETE FROM `creature_loot_template` WHERE `item` = 4655;
+DELETE FROM `spell_loot_template` WHERE `item` = 4655;
+DELETE FROM `gameobject_loot_template` WHERE `item` = 4655;
+
+-- Undo Blue Pearl
+DELETE FROM `gameobject_loot_template` WHERE `item` = 4611;
+
+-- Redo Giant Clam (Vile Reef, STV)
+INSERT INTO `gameobject_loot_template` (`Entry`, `Item`, `Chance`, `LootMode`, `GroupId`,`MinCount`,`MaxCount`) VALUES
+(2264, 4655, 35, 1, 0, 1, 1),
+(2264, 4611,100, 1, 0, 1, 1);
+
+-- Undo Black Pearl
+DELETE FROM `item_loot_template` WHERE `item` = 7971;
+DELETE FROM `creature_loot_template` WHERE `item` = 7971;
+DELETE FROM `gameobject_loot_template` WHERE `item` = 7971;
+
+-- Black Pearls still drop from gem bags
+INSERT INTO `item_loot_template` (`Entry`, `Item`, `Chance`, `LootMode`, `GroupId`,`MinCount`,`MaxCount`) VALUES
+(12033, 7971, 30, 1, 0, 1, 1),
+(11938, 7971,  5, 1, 0, 1, 1),
+(17962, 7971, 30, 1, 0, 1, 1),
+(17963, 7971, 30, 1, 0, 1, 1),
+(17964, 7971, 30, 1, 0, 1, 1),
+(17965, 7971, 30, 1, 0, 1, 1),
+(17969, 7971, 30, 1, 0, 1, 1);
+
+-- Undo Golden Pearl
+DELETE FROM `creature_loot_template` WHERE `item` = 13926;
+DELETE FROM `spell_loot_template` WHERE `item` = 13926;
+
+-- Undo Zesty Clam Meat
+DELETE FROM `creature_loot_template` WHERE `item` = 7974;
+DELETE FROM `skinning_loot_template` WHERE `item` = 7974;
+DELETE FROM `item_loot_template` WHERE `item` = 7974;
+
+-- Redo Big-Mouth Clam
+DELETE FROM `spell_loot_template` WHERE `entry` = 58165;
+INSERT INTO `spell_loot_template` (`Entry`, `Item`, `Chance`, `LootMode`, `GroupId`,`MinCount`,`MaxCount`) VALUES
+(58165,  7974,  100, 1, 0, 1, 1),
+(58165,  7971,  1.0, 1, 1, 1, 1),
+(58165, 13926,  1.7, 1, 1, 1, 1),
+(58165,  5500,  2.3, 1, 1, 1, 1),
+(58165,  5498,  1.0, 1, 1, 1, 1);