Implement bulk load for DataBricks

[anthonysena]

We'd like to have a bulk load for DataBricks that is analogous to the implementation done for RedShift. I will work on this and share it when ready.

[anthonysena]

Leaving this resource here for reference on the proposed approach: https://learn.microsoft.com/en-us/azure/databricks/sql/language-manual/delta-copy-into