Itemvalue misc fixes

[nicopop]

I told myself I should stop making PR past midnight but here's one.

this is #101 but the diff work this time

og. lowercase commit was split into #103
includes multiple small fixes to ItemValue functionality:
b21f576 Renamed world.item_values_cache to world.itemvalue_rule_cache to stop potential confusion with world.item_values
88854ef Split/changed the force reset parameter of the cache of get_items_with_value to be a skip instead. Mainly so it work more like the ItemValue rule function. I made some helper.py functions to replace the reset usage
5150bbc Made both datavalidation of ItemValue (prefill and assert) only check for region with locations in it and their parents using some recursion tech

to explain the how/why of 5150bbc

my fix for https://discord.com/channels/1097532591650910289/1307802587839594617

WHY:

Hooks and Options can remove locations.
I could easily add a check to only test for region with locations but its still possible for a region without to be logically required since parent region can be empty.

HOW:

it work basicaly the same for the PreFill test and the Assert one
the only difference is the way to find the parents

• Assert: Since we only have the basic json, I build a dict(child,list(Parent)) that way I can do the recursion below Removed
• Prefill: I could probably also use the json but I decided to use the entrances since multiworld did it for me anyway

in both case:

1. it checks every region for locations, and if present, add the region to a list
2. since a region can be empty but still be a parent of any of the region on the "has Loc" list, Check recursively the parents and add them to the list.
   2.1 add the parents to an "already checked" list so it's skipped in future recursion
3. once all the used region are identified check their requires, entrance_require and exit require for ItemValue (if the region on the otherside is used of cource).
4. check every location of the region for ItemValues requirement
5. Finally check if we have the items to fullfill those requirements

[nicopop]

I was waiting for some ItemValue bug report before undrafting this PR but it seems that report wont come so ill mark this as ready

[FuzzyGamesOn]

Minor typo, everything else seems good

[FuzzyGamesOn]

Can't believe nico dismissed my previous review, smh my head

[FuzzyGamesOn]