[Feature] support eager mode in model runner v2 (#5210)

### What this PR does / why we need it?
#5051 only implement a basic framework for model runner v2, but there
are still some bugs for e2e functionality, this PR aim to enable basic
functionality.
model runner v2 plans:
https://github.com/vllm-project/vllm-ascend/issues/5208

- vLLM version: release/v0.13.0
- vLLM main:
ad32e3e19c
---------
Signed-off-by: Ronald1995 <ronaldautomobile@163.com>

vllm_ascend/worker/worker.py

@@ -233,8 +233,8 @@ class NPUWorker(WorkerBase):
         self.device = self._init_device()
         # Init ModelRunner here, so that we have access to self.device.
         if self.use_v2_model_runner:
-            logger.error(
-                "npu model runner v2 is in developing, it can't work well for now."
+            logger.warning(
+                "npu model runner v2 is in developing, some features doesn't work for now."
             )
             from vllm_ascend.worker.v2.model_runner import \
                 NPUModelRunner as NPUModelRunnerV2