test: add MySQL MCP tests (#1267)

Add integration tests for MySQL for Cloud SQL's Managed Connection Pooling (MCP)

Author: jackwotherspoon

tests/system/test_pymysql_connection.py

@@ -143,8 +143,3 @@ def test_MCP_pymysql_connection() -> None:
         curr_time = time[0]
         assert type(curr_time) is datetime
     connector.close()
-
-
-def test_broken_test_reports() -> None:
-    '''This test breaks but that's expected'''
-    assert 1 == 2