Support upsert in FlussTable

[luoyuxia]

Search before asking

• I searched in the issues and found nothing similar.

Description

refer to java side https://github.com/apache/fluss/blob/de2d9a042637386f9c8f59bddbff8a1a66853ca0/fluss-client/src/main/java/org/apache/fluss/client/table/Table.java#L74 to make put kv work end to end

Willingness to contribute

• I'm willing to submit a PR!

[leekeiabstraction]

@luoyuxia Please can you assign this to me?