[CI] Add CI branch coverage calculation, fix statement coverage results and add log before test for buildkite log group (#1120)

Signed-off-by: wangyu31577 <wangyu31577@hundsun.com>
Co-authored-by: wangyu31577 <wangyu31577@hundsun.com>

tests/conftest.py

@@ -60,6 +60,12 @@ def clean_gpu_memory_between_tests():
     _run_post_test_cleanup()
 
 
+@pytest.fixture(autouse=True)
+def log_test_name_before_test(request):
+    print(f"--- Running test: {request.node.name}")
+    yield
+
+
 def _run_pre_test_cleanup(enable_force=False):
     if os.getenv("VLLM_TEST_CLEAN_GPU_MEMORY", "0") != "1" and not enable_force:
         print("GPU cleanup disabled")