text: Title: Add support for batching raw queries
  Body: ## Problem
  
  <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
  
  This is currently not supported.
  
  ## Suggested solution
  
  <!-- A clear and concise description of what you want to happen. -->
  
  It is unknown if Prisma actually supports this internally or not but I would be surprised if they didn't.
  
  If it is supported we should add the `execute_raw` query method to the query batcher.