feat(cubesql): Implement format and col_description #3211

Job	Run time
latest-tag-sha	18s
Build native Linux 20 x86_64-unknown-linux-gnu Python fallback	2m 22s
build	6m 18s
tests (20.x, athena-export-bucket-s3)	16m 54s
tests (20.x, bigquery-export-bucket-gcs)	9m 18s
tests (20.x, clickhouse)	5m 11s
tests (20.x, clickhouse-export-bucket-s3)	5m 4s
tests (20.x, databricks-jdbc)	5m 42s
tests (20.x, databricks-jdbc-export-bucket-s3)	7m 32s
tests (20.x, databricks-jdbc-export-bucket-azure)	6m 19s
tests (20.x, mssql)	5m 26s
tests (20.x, mysql)	5m 22s
tests (20.x, postgres)	5m 7s
tests (20.x, redshift)	6m 33s
tests (20.x, redshift-export-bucket-s3)	6m 41s
tests (20.x, snowflake)	5m 42s
tests (20.x, snowflake-export-bucket-s3)	5m 58s
tests (20.x, snowflake-export-bucket-azure)	5m 49s
tests (20.x, snowflake-export-bucket-azure-via-storage-integration)	5m 25s
tests (20.x, snowflake-export-bucket-gcs)	5m 26s
	2h 2m 27s

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