Make JDBCRepositorySQLLoader avoid using `Path#toFile` in GraalVM Native Image #7729

Job	Run time
Import Global Environment / init-environment	3s
E2E - Agent with MySQL (proxy, tracing, jaeger)	6m 8s
E2E - Agent with MySQL (proxy, tracing, zipkin)	6m 5s
E2E - Agent with MySQL (proxy, metrics, prometheus)	7m 32s
E2E - Agent with MySQL (proxy, logging, file)	9m 16s
E2E - Agent with MySQL (jdbc, logging, file)	6m 6s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	6m 55s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	6m 14s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	7m 25s
	55m 44s

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