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Scripts/Examples: Remove outdated example scripts

Remove outdated misleading example scripts not following anymore current TC codestyle and standards.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
Scripts/Examples: Remove some more code related to example scripts
Core/Spell - Fix Remove Aura "The Eye of Acherus"

Fixed remove aura "The Eye of Acherus" http://www.wowhead.com/spell=51852 after use "Recall Eye of Acherus" http://www.wowhead.com/spell=52694 .
Earlier, after using the player remained under the aura.
DB/Quest: Birds of a Feather

Fix this quest so it works as on retail

* Delete permament spawns of Female Kaliri Hatchling, 
* Breaking a egg will now spawn either a Female Kaliri Hatchling or Male Kaliri Hatchling
* Female Kaliri Hatchling will despawn when captured and is now required for quest item to be used.
DB/Quest: Learning to Communicate

* Conditions for The King's Empty Conch
* Scalders Abilities
* On Reward Text
DB/Misc: Error fixes

Closes #13182
DB/Creature: General Lightsbane

Script General Lightsbane for quest If He Cannot be turned
Core/Spells: Fix Ram Racing mechanic
To/Do: Fix Quests and your lazy ass :/
Core/Spells: Added missing stuff in 44bcfb86f5da0a5a374fc5b07431836b3c0f51c7
DB/Quest: Free Your Mind

Proper script for http://www.wowhead.com/quest=12893

Previous script gave credit on these npcs been killed which was wrong behaviour
Misc/Events:
- Fix Quest "There and Back Again" (only Horde-side)
- Fix Quest "Now This is Ram Racing... Almost." (only Horde-side)
- Fix more spell mechanics for racing ram
To/Do: Fix gossips and some optimize
Core/Achievements: Fixed wrong packet generation in AchievementMgr::SendCriteriaUpdate
Merge pull request #13214 from mik1893/achievement

Core/Achievements: fix old typo in AchievementMgr::SendCriteriaUpdate
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into transmog