PYTHON-4147-fix: Remove quote wrapping and remove shell=true usage (mongodb#1513)

Author: Jibola

test/test_monitor.py

@@ -83,9 +83,9 @@ def test_cleanup_executors_on_client_close(self):
     def test_no_thread_start_runtime_err_on_shutdown(self):
         """Test we silence noisy runtime errors fired when the MongoClient spawns a new thread
         on process shutdown."""
-        command = [sys.executable, "-c", "'from pymongo import MongoClient; c = MongoClient()'"]
+        command = [sys.executable, "-c", "from pymongo import MongoClient; c = MongoClient()"]
         completed_process: subprocess.CompletedProcess = subprocess.run(
-            " ".join(command), shell=True, capture_output=True
+            command, capture_output=True
         )
 
         self.assertFalse(completed_process.stderr)