[CI] lint and ut use self_hosted runner (#5652)

### What this PR does / why we need it?
lint and ut use self_hosted runner

- vLLM version: v0.13.0
- vLLM main:
2f4e6548ef

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

tools/mypy.sh

@@ -32,7 +32,7 @@ fi
 
 run_mypy() {
     echo "Running mypy on $1"
-    mypy --check-untyped-defs --follow-imports skip --python-version "${PYTHON_VERSION}" "$@"
+    mypy --follow-imports skip --python-version "${PYTHON_VERSION}" "$@"
 }
 
 run_mypy vllm_ascend