Python: Ability to the Metadata JSON

[Fokko]

Feature Request / Improvement

In order to do updates, we need to alter the Metadata JSON file to point to the latest ManifestList. To update to the latest version a new snapshot needs to be added, and the current snapshot needs to point to the newly created snapshot.

I did a first version attempt in: #6323 @danielcweeks did you have any thoughts on this with respect to the multi-table transactions? The abovementioned PR focusses on table level transactions.

Query engine

None

[ggbaro]

@dariocurr @emanueledomingo @enryls

[github-actions]

This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.

[Fokko]

Not stale :)

[Fokko]

Migrated to the new repository: apache/iceberg-python#22