chore: comparison table on verbose

Only print out the comparison table on session end in verbose mode.

Author: stevenh

Diff for: tests/async/conftest.py

@@ -6,4 +6,5 @@
 @pytest.hookimpl
 def pytest_sessionfinish(session: pytest.Session, exitstatus: int):
     write_results_to_csv()
-    print_comparison_table()
+    if session.config.getoption("verbose"):
+        print_comparison_table()