[Core] Support image processor (#4197)

tests/spec_decode/e2e/conftest.py

@@ -18,9 +18,10 @@ from vllm.engine.arg_utils import AsyncEngineArgs
 from vllm.engine.async_llm_engine import AsyncLLMEngine
 from vllm.lora.request import LoRARequest
 from vllm.model_executor.utils import set_random_seed
+from vllm.multimodal import MultiModalData
 from vllm.outputs import RequestOutput
 from vllm.sampling_params import SamplingParams
-from vllm.sequence import Logprob, MultiModalData
+from vllm.sequence import Logprob
 from vllm.usage.usage_lib import UsageContext
 from vllm.utils import Counter, random_uuid