[Quickfix] update CachedRequestState as NewRequestData changed (#2367)

### What this PR does / why we need it?
1. update `CachedRequestState` as `NewRequestData` changed in
https://github.com/vllm-project/vllm/pull/22570
2. drop maintenance of vllm v0.10.0 in the branch main

### Does this PR introduce _any_ user-facing change?
N/A

### How was this patch tested?
CI passed with existing test.


- vLLM version: v0.10.0
- vLLM main:
92ff41abea

---------

Signed-off-by: MengqingCao <cmq0113@163.com>

tests/ut/kv_connector/utils.py

@@ -157,7 +157,7 @@ def create_request(
         request_id=f"id-{request_id}",
         prompt_token_ids=prompt_token_ids,
         sampling_params=sampling_params,
-        multi_modal_inputs=None,
+        multi_modal_kwargs=None,
         multi_modal_placeholders=None,
         multi_modal_hashes=None,
         **({
@@ -187,19 +187,11 @@ def create_model_runner_output(
 
     # Make output data structure.
     extra_args = {}
-    if not vllm_version_is("0.10.0"):
-        from vllm.v1.worker.kv_connector_model_runner_mixin import \
-            KVConnectorOutput  # type: ignore  # noqa
-        kv_connector_output = KVConnectorOutput(
-            finished_sending=finished_sending,
-            finished_recving=finished_recving)
-        extra_args = {"kv_connector_output": kv_connector_output}
-    else:
-        extra_args = {
-            "finished_sending": finished_sending,
-            "finished_recving": finished_recving,
-        }
-
+    from vllm.v1.worker.kv_connector_model_runner_mixin import \
+        KVConnectorOutput  # type: ignore  # noqa
+    kv_connector_output = KVConnectorOutput(finished_sending=finished_sending,
+                                            finished_recving=finished_recving)
+    extra_args = {"kv_connector_output": kv_connector_output}
     return ModelRunnerOutput(
         req_ids=req_ids,
         req_id_to_index=req_id_to_index,