[Feature Request]: Add Expire Snapshots maintenance in Iceberg

[ahmedabu98]

What would you like to happen?

Add a batch operation that removes outdated metadata files. Associated data files that become untracked as a result should also be removed.

Iceberg Spark documentation: https://iceberg.apache.org/docs/latest/maintenance/#expire-snapshots

Issue Priority

Priority: 2 (default / most feature requests should be filed as P2)

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