feat(frontend): support iceberg predicate pushdown

[kwannoel]

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What's changed and what's your intention?

In this PR, we support predicate pushdown to iceberg sdk.
The sdk will either use zonemap, or manually prune data if zonemap is not available for iceberg table.

We implement iceberg predicate pushdown as a separate pass from the logical predicate pushdown, at the end of batch execution planning. This is because it is logically distinct (pushdown to rw plan nodes vs pushdown to iceberg), we can invoke the predicate pushdown logic just once, and we preserve the hash and eq semantics of the IcebergScan plan nodes.

We also support empty split, in that case we just return no data. It is possible to have empty split, if the predicate prunes out all data from an iceberg table.

Checklist

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[chenzl25]

Rest LGTM

[chenzl25]

LGTM!