Milestone: Include Off-chain Data in BigQuery

[birdychang]

eta: 2023-06-30 description: The data warehouse should also include off-chain data such as deal-making, Slingshot data, and Data Cap applications. E.g., the network growth team is particularly interested in the time-to-deal metric which we are currently unable to serve. This entails data pipelines from upstream data sources to the data warehouse. More details can be found here.