Remove `serverTimezone=UTC` parameter at MySQLConnectionPropertiesParser and E2E #7777

Job	Run time
Import Global Environment / init-environment	6s
E2E - Agent with MySQL (proxy, tracing, jaeger)	6m 13s
E2E - Agent with MySQL (proxy, tracing, zipkin)	6m 1s
E2E - Agent with MySQL (proxy, metrics, prometheus)	6m 5s
E2E - Agent with MySQL (proxy, logging, file)	5m 49s
E2E - Agent with MySQL (jdbc, logging, file)	5m 53s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	6m 1s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	5m 48s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	6m 7s
	48m 3s

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