refactor(cubesql): Fix clippy warnings in cubesql, part 2 #3695

Job	Run time
latest-tag-sha	23s
latest-tag-sha	23s
Build native Linux 20 x86_64-unknown-linux-gnu Python fallback	2m 38s
Build native Linux 20 x86_64-unknown-linux-gnu Python fallback	2m 38s
build	5m 26s
build	7m 25s
tests	0s
tests (20.x, athena-export-bucket-s3)	19m 13s
tests (20.x, bigquery-export-bucket-gcs)	7m 59s
tests (20.x, clickhouse)	5m 30s
tests (20.x, clickhouse-export-bucket-s3)	5m 27s
tests (20.x, databricks-jdbc)	5m 58s
tests (20.x, databricks-jdbc-export-bucket-s3)	6m 27s
tests (20.x, databricks-jdbc-export-bucket-azure)	6m 23s
tests (20.x, mssql)	5m 45s
tests (20.x, mysql)	5m 14s
tests (20.x, postgres)	5m 21s
tests (20.x, redshift)	5m 50s
tests (20.x, redshift-export-bucket-s3)	5m 48s
tests (20.x, snowflake)	5m 37s
tests (20.x, snowflake-export-bucket-s3)	5m 47s
tests (20.x, snowflake-export-bucket-azure)	6m 29s
tests (20.x, snowflake-export-bucket-azure-via-storage-integration)	5m 41s
tests (20.x, snowflake-export-bucket-gcs)	5m 41s
	2h 13m 3s

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