Tests: test that item/location name groups are not empty

[black-sliver]

What is this fixing or adding?

Adds a test to see if any game defines empty item/location name groups, which is likely a bug.

How was this tested?

Unit tests.

[black-sliver]

SoE fixed in #2747

KH2 failing for Location name group "Armored Xemnas" of "Kingdom Hearts 2" is empty @JaredWeakStrike

[alwaysintreble]

maybe not this PR but since we're adding a new module for groups probably want to move the existing tests to this module such as https://github.com/ArchipelagoMW/Archipelago/blob/main/test/general/test_items.py#L17

[Jarno458]

LGTM

[black-sliver]

maybe not this PR but since we're adding a new module for groups probably want to move the existing tests to this module such as https://github.com/ArchipelagoMW/Archipelago/blob/main/test/general/test_items.py#L17

Makes sense, yeah. I'm waiting for KH2 before I do something that might conflict later. 😅

[JaredWeakStrike]

maybe not this PR but since we're adding a new module for groups probably want to move the existing tests to this module such as https://github.com/ArchipelagoMW/Archipelago/blob/main/test/general/test_items.py#L17

Makes sense, yeah. I'm waiting for KH2 before I do something that might conflict later. 😅

#2757

[black-sliver]

maybe not this PR but since we're adding a new module for groups probably want to move the existing tests to this module such as https://github.com/ArchipelagoMW/Archipelago/blob/main/test/general/test_items.py#L17

Makes sense, yeah. I'm waiting for KH2 before I do something that might conflict later. 😅

I put it on my TODO list. I think merging this now is better than delaying it.