Optimized flower_pot_cross_emissive model

[muzikbike]

Request Description

1.21.4 adds eyeblossoms, the open variant of which uses a new template model for when placed inside of a flower pot, which my prior model fix predates and therefore does not account for. An optimized variant of this model will need to be created in the interests of consistency with other potted object models (which I should be able to do later).