Refactor ShadowDataSourceMappingsFinderFactory #12678

Job	Run time
Import Global Environment / init-environment	3s
Build E2E Image	8m 45s
E2E - Agent with MySQL (proxy, tracing, jaeger)	6m 55s
E2E - Agent with MySQL (proxy, tracing, zipkin)	7m 8s
E2E - Agent with MySQL (proxy, metrics, prometheus)	7m 22s
E2E - Agent with MySQL (proxy, logging, file)	6m 54s
E2E - Agent with MySQL (jdbc, logging, file)	6m 51s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	10m 51s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	7m 1s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	6m 38s
	1h 8m 28s

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