Add Oracle UPSERT #1729

Job	Run time
build (cloudsql-mysql-plugin)	2h 19m 42s
build (oracle-plugin)	13m 43s
build (cloudsql-postgresql-plugin)	1h 6m 53s
build (mysql-plugin)	1h 45m 28s
build (mssql-plugin)	2h 15m 31s
build (postgresql-plugin)	1h 3m 20s
	8h 44m 37s

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