This Google Analytics documentation page shows the BigQuery Export schema for the Google Analytics data that is exported to BigQuery. As you will see, the DoubleClick Campaign Manager (DCM) data is not part of the BigQuery export, unlike the DoubleClick for Publishers (DFP), which does appear (these are all the hits.publisher.<DFP_METRIC>
metrics).
Therefore, as explained by @BenP in the comments, you may be interested in the BigQuery Data Transfer service, which does have a feature for DoubleClick Campaign Manager Transfers. Unfortunately, I am not an expert in Google Analytics or DCM, and therefore cannot add much relevant info to the process of linking both sets of data, but maybe you can try combining them yourself and then post a new question for that matter if you do not success in doing so.