test(backup): expect multi-database pg_dump layout for postgres/times… #37

Job	Run time
backup-restore (postgresql, single)	24s
backup-restore (timescaledb, single)	31s
backup-restore (timescaledb, multipart)	34s
backup-restore (postgresql, multipart)	21s
backup-restore (sqlite, single)	11s
backup-restore (mariadb, single)	25s
backup-restore (mariadb, multipart)	26s
backup-restore (mysql, single)	35s
backup-restore (sqlite, multipart)	12s
backup-restore (mysql, multipart)	33s
	4m 12s

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