[1/N] Reorganize multimodal processing code (#32327)

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

vllm/model_executor/models/nano_nemotron_vl.py

@@ -62,7 +62,8 @@ from vllm.multimodal.parse import (
     MultiModalDataItems,
     MultiModalDataParser,
 )
-from vllm.multimodal.processing import (
+from vllm.multimodal.processing import BaseDummyInputsBuilder
+from vllm.multimodal.processing.processor import (
     BaseMultiModalProcessor,
     BaseProcessingInfo,
     PromptReplacement,
@@ -70,7 +71,6 @@ from vllm.multimodal.processing import (
     PromptUpdateDetails,
     _seq2tokens,
 )
-from vllm.multimodal.profiling import BaseDummyInputsBuilder
 from vllm.sequence import IntermediateTensors
 from vllm.tokenizers import TokenizerLike, cached_tokenizer_from_config
 from vllm.transformers_utils.configs.radio import RadioConfig