Optimize ShardingSpherePreparedStatement for multi executionContext #7533

Job	Run time
Import Global Environment / init-environment	6s
E2E - Agent with MySQL (proxy, tracing, jaeger)	8m 36s
E2E - Agent with MySQL (proxy, tracing, zipkin)	9m 41s
E2E - Agent with MySQL (proxy, metrics, prometheus)	10m 42s
E2E - Agent with MySQL (proxy, logging, file)	10m 53s
E2E - Agent with MySQL (jdbc, logging, file)	7m 43s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	10m 12s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	11m 17s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	9m 51s
	1h 19m 1s

Provide feedback