Transfer all unbuilt units on death

[lL1l1]

Description of the proposed changes

Resolves #6361.

• Changes the categories for structure transfer from T4s and T3 Arty to all units.
• Adjusts the stats of the wreckage created when a unit rebuild fails so that the wreckage has the full mass of the failed unit.

Testing done on the proposed changes

Spawn a paragon and some t3 engineers (they dont shoot) then build any unfinished structure or unit from a factory and run the console command to transfer the units to the opposite of the current focused army:

SimLua 
local units = ArmyBrains[GetFocusArmy()]:GetListOfUnits(categories.ALLUNITS)
local SimUtils = import('/lua/SimUtils.lua')
local target = GetFocusArmy() == 2 and {1} or {2}
ForkThread(SimUtils.TransferUnfinishedUnitsAfterDeath, units, target, false)

All structures get shared properly, and unbuilt units in factories turn into wrecks of the same partial cost as the unbuilt unit.

Didn't test performance, I'm not sure how to.

Checklist

• Changes are annotated, including comments where useful
• Changes are documented in the changelog for the next game version

[Garanas]

@MrRowey the hotfix did not happen (yet), do we want this to be part of that?

[MrRowey]

Yes this is fine as it more of a bug fix