Core/Auras: Convert most rules from Aura::CanBeSaved to a custom spell attribute

sql/updates/world/4.3.4/2023_08_19_00_world.sql

@@ -0,0 +1,21 @@
+ALTER TABLE `spell_custom_attr`
+  MODIFY `entry` int(10) unsigned NOT NULL DEFAULT '0' COMMENT 'spell id',
+  MODIFY `attributes` int(10) unsigned NOT NULL DEFAULT '0' COMMENT 'SpellCustomAttributes';
+
+DELETE FROM `spell_custom_attr` WHERE `entry` IN (44413, 40075, 55849, 96206, 81206, 81207, 81208, 81209, 68631, 89912, 67483, 67484, 48517, 48518, 94338);
+INSERT INTO `spell_custom_attr` (`entry`, `attributes`) VALUES
+(44413, 0x01000000),
+(40075, 0x01000000),
+(55849, 0x01000000),
+(96206, 0x01000000),
+(81206, 0x01000000),
+(81207, 0x01000000),
+(81208, 0x01000000),
+(81209, 0x01000000),
+(68631, 0x01000000),
+(89912, 0x01000000),
+(67483, 0x01000000),
+(67484, 0x01000000),
+(48517, 0x01000000),
+(48518, 0x01000000),
+(94338, 0x01000000);