text: Title: Support skipping pydantic validation
  Body: ## Problem
  
  <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
  
  One reason for slower performance is that we validate the data that the prisma engine gives us using pydantic models. At least providing an option to skip validation would give a decent performance boost.
  
  However, there are a couple concerns with this:
  
  - We make use of custom pydantic validators for custom field types
  - This will break subclass behaviour - Users will no longer be able to subclass models and write custom validators
  
  ## Suggested solution
  
  <!-- A clear and concise description of what you want to happen. -->
  
  Add a config option to disable pydantic validation and if enabled, call `BaseModel.construct()` instead.
  