Remove hardcoded Power Armor encumbrance reduction

[John-Candlebury]

Summary

None

Purpose of change

Fix #54722

Describe the solution

Remove the hard coded encumbrance reduction that was automatically granted to active power armors, and a replace them with standard JSON definitions.

As a side effect, the pseudo active qualities of the helmet were removed, and now you have to activate it manually. A small inconvenience compared to before, but I think making them work like our standard tool_armors makes them easier to maintain and expand.

Describe alternatives you've considered

Figuring how to fix this while also keeping the pseudo active helmet.

Testing

Load and test the armors to check if the linked issue was solved.

[Drew4484]

Nice work!