text: Title: Resolve incorrect handling of configuration overrides in pydantic
  Body: https://github.com/pydantic/pydantic-settings/issues/180 - we probably want to make the sources in [`_settings_build_values`](https://github.com/pydantic/pydantic-settings/blob/8c5a45e43cca4e88a6d65fcb280529499fc6200a/pydantic_settings/main.py#L146) convert the keys to field names from aliases in case `populate_by_name` is set. 
  
  Note that we'll need to wait for upstream to release this