[1/N][Attention] Restructure attention: move files (#31916)

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>

vllm/model_executor/models/isaac.py

@@ -16,11 +16,11 @@ from transformers.image_processing_utils import BatchFeature
 from transformers.tokenization_utils import TensorType
 from typing_extensions import TypedDict, Unpack
 
-from vllm.attention.layers.mm_encoder_attention import MMEncoderAttention
 from vllm.config import MultiModalConfig, VllmConfig
 from vllm.config.model import ModelConfig
 from vllm.distributed import parallel_state
 from vllm.distributed import utils as dist_utils
+from vllm.model_executor.layers.attention.mm_encoder_attention import MMEncoderAttention
 from vllm.model_executor.layers.linear import (
     ColumnParallelLinear,
     QKVParallelLinear,