yer to apply on hidden states before
passing to Transformer blocks. Set it to None if normalization is not needed.   embedding_proj_norm_type (str, optional, defaults to None) —
The normalization layer to apply on the input proj_embedding. Set it to None if normalization is not
needed.   encoder_hid_proj_type (str, optional, defaults to linear) —
The projection layer to apply on the input encoder_hidden_states. Set it to None if
encoder_hidden_