feat(cubesql): Implement format and col_description #3288

Job	Run time
latest-tag-sha	19s
Build native Linux 20 x86_64-unknown-linux-gnu Python fallback	2m 20s
build	6m 41s
tests (20.x, athena-export-bucket-s3)	17m 42s
tests (20.x, bigquery-export-bucket-gcs)	8m 4s
tests (20.x, clickhouse)	5m 6s
tests (20.x, clickhouse-export-bucket-s3)	5m 4s
tests (20.x, databricks-jdbc)	5m 44s
tests (20.x, databricks-jdbc-export-bucket-s3)	6m 29s
tests (20.x, databricks-jdbc-export-bucket-azure)	6m 27s
tests (20.x, mssql)	5m 27s
tests (20.x, mysql)	5m 17s
tests (20.x, postgres)	5m 16s
tests (20.x, redshift)	5m 23s
tests (20.x, redshift-export-bucket-s3)	6m 35s
tests (20.x, snowflake)	5m 20s
tests (20.x, snowflake-export-bucket-s3)	5m 48s
tests (20.x, snowflake-export-bucket-azure)	5m 31s
tests (20.x, snowflake-export-bucket-azure-via-storage-integration)	5m 55s
tests (20.x, snowflake-export-bucket-gcs)	5m 26s
	1h 59m 54s

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