DB/Misc: Remove more additem hacks

Use proper spells for creating items instead of sai action 56,  this leaves only NR items using this action to add items as data missing for spells.
SQL: Sync world_database after tdb 335.56 release
Scripts/Shadowmoon Valley: Fix static analysis issues added in cd48ee01c0b1465c5b07427bb6fe9baa57f053b9

Fix static analysis issues added in cd48ee01c0b1465c5b07427bb6fe9baa57f053b9 about uninitialized values and pointers possibly point to free'd memory being dereferenced.
In memory of all the developers who got banned from IRC in the process of fixing these issues.
SQLs: Rename updates/world sql files to the new format
Core:/SmartScript: Added log for item has credit spell blabla
DB/Creature Model: Fix a few models by AriDEV
Core/Misc: Refactor scripts to fix static analysis warnings

Seventh batch of fixes targeting 100 issues reported by Coverity
Scripts/Examples: Remove outdated example scripts

Remove outdated misleading example scripts not following anymore current TC codestyle and standards. Please refer to the wiki or forum for up to date examples and documentation.
Core/Players/DK: Implement Rune Grace Period mechanic

Closes #11736
Fixes #6122
p4
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb