slo

* Fixed goroutine leak on closing `database/sql` driver #3144

Job	Run time
Run YDB SLO Tests (database_sql_propose, database-sql-propose, ./database/sql/propose, database/s...	10m 54s
Run YDB SLO Tests (database_sql_legacy, database-sql-legacy, ./database/sql/legacy, database/sql/...	11m 8s
Run YDB SLO Tests (gorm_legacy, gorm-legacy, ./gorm/legacy, gorm/legacy)	11m 20s
Run YDB SLO Tests (native_query, native-query, ./native/query, native/query)	11m 6s
Run YDB SLO Tests (gorm_propose, gorm-propose, ./gorm/propose, gorm/propose)	14m 40s
Run YDB SLO Tests (native_table_legacy, native-table-legacy, ./native/table/legacy, native/table/...	11m 11s
Run YDB SLO Tests (native_table_propose, native-table-propose, ./native/table/propose, native/tab...	10m 57s
Run YDB SLO Tests (xorm_legacy, xorm-legacy, ./xorm/legacy, xorm/legacy)	11m 21s
Run YDB SLO Tests (xorm_propose, xorm-propose, ./xorm/propose, xorm/propose)	11m 31s
	1h 44m 8s

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