AH related fixes

Load items from memory instead of DB (may break 3rd party programs)
Fix item suffix search Closes #9196
For AHBot set expired auctions ignored from update process
Merge pull request #13455 Rochet2/ah

AH related fixes
Core/AH: Code cleanup

Remove unused paramters from RemoveAuction(), kept till now for compatibility with ahbot patch.
Reverts 28dffbee11024c1abc82a29a3fef655d9262904b