PartsStore - Fix EquipmentParts and OmniPods - Fixes Hatchets and Maces at least

[WeaverThree]

PartsStore's generator for miscellaneous EquipmentParts was not using new instances of the part everywhere it needed to. In particular this was causing this to happen:

1. New Hatchet A is generated with Omnipod turned off.
2. Hatchet A is placed in parts list.
3. New Hatchet B is generated with OmniPod turned on.
4. Hatchet B is placed in parts list.
5. Hatchet B is used to generate an empty OmniPod.
6. Empty OmniPod constructor turns off OmniPoddedness on Hatchet B, which propagates back to the one in the parts list.

Which results in two copies of each non-OmniPodded hatchet in the parts store, effectively:

My change adds a Hatchet C used to create the OmniPod, which fixes this:

The same is true for at least Maces if not other misc-type EquipmentParts

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.43%. Comparing base (a339462) to head (c0adb0c).
Report is 157 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5100   +/-   ##
=========================================
  Coverage     10.42%   10.43%           
- Complexity     6028     6036    +8     
=========================================
  Files           953      953           
  Lines        134113   134123   +10     
  Branches      19435    19437    +2     
=========================================
+ Hits          13979    13991   +12     
- Misses       118785   118787    +2     
+ Partials       1349     1345    -4     

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