Support update statistics in transaction

[CTTY]

Is your feature request related to a problem or challenge?

Support update statistics as a transaction API

Describe the solution you'd like

Add an API like below and implement set_stats and remove_stats within the UpdateStatistics

/// Update the statistics of table
    pub fn update_statistics(self) -> UpdateStatistics<'a> {
        UpdateStatistics::new(self)
    }

Willingness to contribute

I would be willing to contribute to this feature with guidance from the Iceberg Rust community