Enable regional compilation on z-image transformer model (#12736)

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Author: sayakpaul

src/diffusers/models/transformers/transformer_z_image.py

@@ -328,6 +328,7 @@ def __call__(self, ids: torch.Tensor):
 class ZImageTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOriginalModelMixin):
     _supports_gradient_checkpointing = True
     _no_split_modules = ["ZImageTransformerBlock"]
+    _repeated_blocks = ["ZImageTransformerBlock"]
     _skip_layerwise_casting_patterns = ["t_embedder", "cap_embedder"]  # precision sensitive layers
 
     @register_to_config