S3, GCS, Azure Blob Destinations

[kmacrow]

• add append-only hive table format destinations for s3, gcs, azure blob
• introduces a format connection param for the object store connectors that configures the format to write:
  • staging: an internal format optimized for staging data for load/unload between other data stores
  • hive: Hive compatible table format with a dt=<transfer_date> partition
  • future I imagine we can add iceberg, delta, etc. as supported formats
• integration test scaffolding to demo how they work, but these need to be extended
• new docs pages for connectors