text: Title: Ensure multi schema models work
  Body: ## Problem
  
  <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
  
  Prisma added [preview feature support](https://github.com/prisma/prisma/issues/1122#issuecomment-1231773471) for `multiSchema` in `v4.3.0`, we should make sure this works for Prisma Client Python.
  
  ## Suggested solution
  
  <!-- A clear and concise description of what you want to happen. -->
  
  Write tests. I suspect this will already be supported.