[Misc]] Move processing context to multimodal directory (#25548)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

tests/models/multimodal/processing/test_common.py

@@ -12,11 +12,11 @@ from mistral_common.protocol.instruct.request import ChatCompletionRequest
 from PIL import Image
 
 from vllm.config import ModelConfig
-from vllm.inputs import InputProcessingContext
 from vllm.multimodal import MULTIMODAL_REGISTRY, MultiModalDataDict
 from vllm.multimodal.cache import MultiModalProcessorOnlyCache
 from vllm.multimodal.inputs import MultiModalInputs
-from vllm.multimodal.processing import BaseMultiModalProcessor
+from vllm.multimodal.processing import (BaseMultiModalProcessor,
+                                        InputProcessingContext)
 from vllm.transformers_utils.tokenizer import (AnyTokenizer, MistralTokenizer,
                                                cached_tokenizer_from_config,
                                                encode_tokens)