e in feed-forward. See diffusers.models.activations.get_activation for supported
activation functions.   norm_elementwise_affine (bool, optional) —
Configure if the TransformerBlock should use learnable elementwise affine parameters for normalization.   double_self_attention (bool, optional) —
Configure if each TransformerBlock should contain two self-attention layers.
positional_embeddings — (str, optional):
The type of positional embeddings t