[Misc] Rename assets for testing (#17575)

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

tests/models/multimodal/processing/test_llama4.py

@@ -6,7 +6,7 @@ import pytest
 from vllm.multimodal import MULTIMODAL_REGISTRY
 from vllm.transformers_utils.tokenizer import encode_tokens
 
-from ....conftest import _ImageAssets
+from ....conftest import ImageTestAssets
 from ...utils import build_model_context
 
 
@@ -17,7 +17,7 @@ from ...utils import build_model_context
 @pytest.mark.parametrize("disable_mm_preprocessor_cache", [True, False])
 @pytest.mark.parametrize("tokenized_prompt", [True, False])
 def test_processor_override(
-    image_assets: _ImageAssets,
+    image_assets: ImageTestAssets,
     model_id: str,
     mm_processor_kwargs: dict,
     num_imgs: int,