slo

refactored query stats: implemetation instead interface #3067

Job	Run time
Run YDB SLO Tests (database_sql_legacy, database-sql-legacy, ./database/sql/legacy, database/sql/...	11m 18s
Run YDB SLO Tests (database_sql_propose, database-sql-propose, ./database/sql/propose, database/s...	11m 5s
Run YDB SLO Tests (gorm_legacy, gorm-legacy, ./gorm/legacy, gorm/legacy)	11m 18s
Run YDB SLO Tests (native_query, native-query, ./native/query, native/query)	11m 7s
Run YDB SLO Tests (gorm_propose, gorm-propose, ./gorm/propose, gorm/propose)	11m 22s
Run YDB SLO Tests (native_table, native-table, ./native/table, native/table)	11m 23s
Run YDB SLO Tests (xorm_propose, xorm-propose, ./xorm/propose, xorm/propose)	11m 36s
Run YDB SLO Tests (xorm_legacy, xorm-legacy, ./xorm/legacy, xorm/legacy)	11m 16s
	1h 30m 25s

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