[DOP-19901] Add integration MSSQL tests & CI

Author: Ilyas Gasanov

syncmaster/worker/handlers/db/mssql.py

@@ -28,7 +28,7 @@ def connect(self, spark: SparkSession):
             user=self.connection_dto.user,
             password=self.connection_dto.password,
             database=self.connection_dto.database_name,
-            extra=self.connection_dto.additional_params or {"trustServerCertificate": "true"},
+            extra={**self.connection_dto.additional_params, "trustServerCertificate": "true"},
             spark=spark,
         ).check()