[V1] Fix CI tests on V1 engine (#10272)

Signed-off-by: Woosuk Kwon <woosuk.kwon@berkeley.edu>

tests/v1/engine/test_engine_core.py

@@ -27,6 +27,9 @@ def make_request() -> EngineCoreRequest:
         request_id=uuid.uuid4(),
         prompt=PROMPT,
         prompt_token_ids=PROMPT_TOKENS,
+        mm_data=None,
+        mm_placeholders=None,
+        mm_processor_kwargs=None,
         sampling_params=SamplingParams(),
         eos_token_id=None,
         arrival_time=time.time(),