Core/RBAC: Simplify RBAC implementation
- Drop groups (roles than can have inherited roles) and roles (set of
  permissions)
- Permissions can now have inherited permissions (those act as roles)

RBAC DB structure is now limited to four tables
- rbac_permissions: Contains permissions and roles
- rbac_linked_permissions: Contains the relation between permissions and
  linked permissions (those permissions that have linked permissions are
  called roles)
- rbac_default_permissions: Contains the list of permissions to be granted
  to each security level [Added to maintain compatibility in an easy way]
- rbac_account_permissions: Contains the list of permissions granted or
  denied for a particular account.

NOTE: IF YOU ARE USING CUSTOM PERMISSIONS, ROLES OR GROUPS CHECK THE SQL
BEFORE APPLYING...
Fix compile under linux and update auth db with latest changes
DB/SAI: Leading the Ancestors Home

By @dr-j fixes #10783
DB/SAI: Neltharion's Flame (12267)

By @dr-j fixes #10965
DB/SAI: Finding the Source

By @dr-j fixes #10943
DB/Update: Gibblewilt fear spam

By @Vincent-Michael fixes #10627
DB/Update: Plan B

By @untaught fixes #10787
DB/SAI: Hampering their Escape

By @untaught fixes #10780
DB/SAI: Destroying the Alters

By @untaught fixes #10841
Tools/MeshExtractor: Fixed(??????) Doodads in the terrain.
Semi-fixed WMOs in the terrain, they are wrongly rotated.
P.D: HALP
P.P.D: Entered "I don't know what i'm doing" mode.
Tools/MeshExtractor: Fixed Doodads and WMOs in the terrain.
Cleaned up a little.
Tools/MeshExtractor: Some more cleanup and memory management improvements.
Tools/MeshExtractor: Removed some redundant code
Tools/MeshExtractor: Implemented mmap mesh generation for instances (They do not have ADT files, they're just a big WMO).
Cleaned up some things and fixed some errors.
ToDo:
* Test this a bit more.
* Cleanup the codebase for this, remove duplicated code.
Core/SAI: Add 'playerOnly' parameters to SMART_TARGET_CLOSEST_ENEMY and SMART_TARGET_CLOSEST_FRIENDLY. Wiki is updated accordingly.
DB/Loot: Fix Satchel of Helpful Goods

Closes #10552
Closes #10292
DB/Loot: correct petdrops from the fishingbags and cleanup the misused reference

Closes #10975
DB/SAI: Correction on waypoints for quest npc.

Closes #10937
Core/RBAC: Fix errors in RBAC sql related to ea2fe0217d