Update Spawn Assets Placement [AARD-2083]

[ryanzhangofficial]

Task

Make sure all robots or fields in spawn assets are under their corresponding type.

Symptom

Currently, if you import a custom robot file under the fields tab, it is correctly shown under the robots tab in Configure Assets, but stays under the fields tab in Spawn Assets.

Solution

Correctly infer actual asset type when caching and spawn using entry's own type and actual object type.

Verification

Imported dozer mira file in field tab, and it appears under robot in spawn assets now.

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[rutmanz]

Duplicate of AARD-2069 and is also addressed by #1273.

This approach also doesn't allow for gamepiece assets (which can't be distinguished internally by the .dynamic field

[PepperLola]

Closing in favor of #1273 which fixes the same issue and needs to be merged anyway