Add post-processing SQL over semantic query results #609

Job	Run time
snowflake-integration	19s
bigquery-integration	32s
clickhouse-integration	37s
postgres-integration	38s
ADBC integration (postgres)	49s
ADBC integration (snowflake)	42s
ADBC integration (bigquery)	51s
ADBC integration (clickhouse)	52s
	5m 20s

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