[lua] Add level penalty to picklocking Treasure Chests / Treasure Coffers

[Hatberg]

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What does this pull request do?

Adds decreased success/increased failure rate to opening Treasure Coffers and Treasure Chests when using picklocking tools.
(Leaves Trap/Mimic rate unaffected)

Based on @ThrisStraizo treasure chest and treasure coffer picking tests, a 5% penalty per THF level under the treasureLevel is applied.

Addresses bug #9986

Steps to test these changes

!changejob thf 1
!zone FeiYin
!additem living_key 99
!gotoname Treasure_Chest
Trade Living Key to Treasure Chest

• It should no longer be possible for low level players to pick locks, unless they are within a certain level range.
• Players that match or exceed the treasureLevel are unaffected.
• Zone Key users are unaffected.