[hive] Support multiset type in hive reads

[ArnavBalyan]

Purpose

• Hive maps Paimon multiset to map type in table schema, but PaimonObjectInspectorFactory has no multiset support.
• This causes any hive query on a table containing a multiset column fails, even when selecting other columns.
• Create a PaimonMapObjectInspector with map type, similar to the internalMap layout to represent multiset types in Paimon today.

Tests

• UT