v1.7.7

1.7.6 was accidentally pushed with beta Materialized View code, hence the skip to 1.7.7. This release rolls back databricks-sql-connector to version 2.9.3, but otherwise includes dbt-databricks 1.7.4 fixes, as version 3.0.x has retry behavior that was insufficient for connecting to cold SQL Warehouses. I will work on addressing that separately so that we can go back to using the 3.x branch of the sql connector.