[Misc] Reorganize inputs (#35182)

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

tests/models/multimodal/generation/test_pixtral.py

@@ -13,8 +13,8 @@ from mistral_common.tokens.tokenizers.multimodal import image_from_chunk
 from transformers import AutoProcessor
 
 from vllm import SamplingParams, TextPrompt, TokensPrompt
+from vllm.inputs import MultiModalDataBuiltins
 from vllm.logprobs import Logprob, SampleLogprobs
-from vllm.multimodal import MultiModalDataBuiltins
 from vllm.platforms import current_platform
 
 from ....utils import VLLM_PATH, large_gpu_test