Commit transaction on last write operation

[lavrukov]

https://github.com/ydb-platform/ydb-java-sdk/blob/develop/table/src/main/java/tech/ydb/table/transaction/TableTransaction.java#L36

The YDB SDK has a feature in TableTransaction where we can commit a transaction in one query with executeDataQuery. This can save time on network communication if we send this flag instead of a separate commit. For read queries, we can't determine if the query is the last in the transaction or not. However, we have a queue for write queries that executes at the end of user-code transactions, and in this case, we know which query is the last.