chunk_content: e prompt encoder.
  output_size (int) — The output size of the prompt encoder.
  hidden_size (int) — The hidden size of the prompt encoder.
  total_virtual_tokens (int): The total number of virtual tokens of the
  prompt encoder.
  encoder_type (Union[PromptEncoderReparameterizationType, str]): The encoder type of the prompt
  encoder.
  Input shape: (batch_size, total_virtual_tokens)
  Output shape: (batch_size, total_virtual_tokens, token_dim)
  
  Prefix tuning