bug: ManifestList parsing should not require `partition_type`.

[liurenjie1024]

In manifest list parser, we ask user to pass in a partition_type. This is incorrect since different manifest file may have different partition spec, so we should ask user to pass a HashMap<i32, StructType>, e.g. a mapping from partition spec id to partition type. See https://iceberg.apache.org/spec/#snapshots

[liurenjie1024]

cc @ZENOTME

[ZENOTME]

Thanks! I will send a PR to fix it later.