[PLUGIN-1949] Add Oracle UPSERT #1728

Job	Run time
build (cloudsql-mysql-plugin)	2h 19m 38s
build (postgresql-plugin)	1h 3m 20s
build (mysql-plugin)	1h 45m 20s
build (oracle-plugin)	1m 0s
build (cloudsql-postgresql-plugin)	1h 6m 49s
build (mssql-plugin)	2h 15m 54s
	8h 32m 1s

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