fix: pizza parlor

[0Monet]

Purpose of change

Use "roof_palette" for "s_pizza_parlor_roof".
Remove "weight" from "s_pizza_parlor_roof", "s_pizza_parlor_roof_1".
Create two nested mapgen to make the floor under the kitchen furniture in "s_pizza_parlor" look good.

Describe the solution

JSON changes.

Describe alternatives you've considered

Do nothing.

Testing

1. Go to the pizza parlor.
2. Mapgen nested are placed and no visible problems.

Additional context

Before:

After:

After without nested mapgen:

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[scarf005]

LGTM