Minor refactor for EncryptSQLRewriteContextDecorator #13584

Job	Run time
Import Global Environment / init-environment	6s
Build E2E Image	7m 3s
E2E - Agent with MySQL (proxy, tracing, jaeger)	5m 51s
E2E - Agent with MySQL (proxy, tracing, zipkin)	5m 14s
E2E - Agent with MySQL (proxy, metrics, prometheus)	5m 39s
E2E - Agent with MySQL (proxy, logging, file)	5m 32s
E2E - Agent with MySQL (jdbc, logging, file)	5m 3s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	5m 16s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	4m 58s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	5m 28s
	50m 10s

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