Cellpose VenvRecipe should output objects

[tlancon]

https://github.com/AiviaCommunity/PythonForAivia/tree/master/VenvRecipes/CellposeVenv

For this to happen, cellpose should choose to use a 2D or 3D recipe based on the input dimensions

This allows Aivia to take advantage of Cellpose's novel separation algorithm, one of its biggest strengths