feat(balance): enhanced electric motor breaks into alloy sheets

[chaosvolt]

Checklist

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• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax so it can be closed automatically.
• I have committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

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Purpose of change

A lil thing that came up in discussion of #5805, enhanced motor's item form is made of superalloy, flavored as being lighter and more efficient than a regular motor of its size, and if made craftable likely should use superalloy in its recipe, BUT the vehiclepart returns just plain metal in its breaks_into entry.

Since balance discussion of a recipe for it is still ongoing I decided to eyeball its breakdown results in a separate PR.

Describe the solution

Changed the breaks_into entry for an installed enhanced motor, returning as many alloy sheets as it previously did steel lumps. Steel chunks removed from the breakage results outright, scrap metal was retained since it could be from other components in the motor breaking down into scrap.

Describe alternatives you've considered

1. A comprehensive realism pass of everything that might hypothetically be in each motor when smashed, which will derail the other PR with needing components updated to be consistent, whereas this smol change will only make one recipe need to be updated for consistency (and current discussion suggests it'll soon be made to use superalloy regardless since the item uses that material anyway).
2. Pestering the PR OP to update breakage results in the PR itself. Eh, it's already inconsistent in current main branch right this minute and a quick consistency-fix will be less likely to get held up in discussion. :>

Testing

Checked affected file for syntax and lint errors.

Additional context