Misc. fixes for vehicle part variants

[dseguin]

Summary

None

Purpose of change

• Fixes Solar panel disappears if 2nd shape option was selected - complete_vehicle install part fails #55524.
• Fixes Vehicle parts with the same name as another part can't be installed #55511.

Installing a vehicle part includes all parts with the same name as possible variant shapes. This includes appliance parts (ap_solar_panel vs. solar_panel), which caused the issue in #55524.

Describe the solution

This includes 3 separate fixes:

• Don't include appliance parts when choosing a vehicle part variant.
• Separate the base variant (different part id's with the same name) from variant shapes (possible shapes for a single part id). When multiple base variants are available, include the id to distinguish between them (they would otherwise all have the same name in this case).
• Update the windshield parts to use distinct names.

Describe alternatives you've considered

Just changing the names of these parts so they don't conflict when choosing a variant.

Testing

Testing fix for #55524

Attempting to install a solar panel skips the variant selection menu, since the only other part named "solar panel" is an appliance. No errors or debug messages.

Testing fix for #55511

While keeping the same name for windshield parts, installing a windshield prompts for a base part and a variant shape:

With the names changed, the parts are separately installable:

Additional context