[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>

.github/workflows/_e2e_test.yaml

@@ -125,6 +125,8 @@ jobs:
           pytest -sv --durations=0 tests/e2e/singlecard/spec_decode_v1/test_v1_mtp_correctness.py
           pytest -sv --durations=0 tests/e2e/singlecard/spec_decode_v1/test_v1_spec_decode.py
 
+          pytest -sv --durations=0 tests/e2e/singlecard/model_runner_v2/test_basic.py
+
   e2e-2-cards:
     name: multicard-2
     runs-on: linux-aarch64-a3-2