[core] Support IsNaN predicate pushdown with Parquet

[ArnavBalyan]

Purpose

• Paimon has no IsNaN predicate today, add support for the same with Paimon evaluation and parquet pushdown
• Add IsNaN as a new LeafUnaryFunction, which can evaluate rows and pushdown to Parquet for double and float
• ParquetFilters pushes down to Parquet via new UserDefinedPredicate.

Tests

• UT

[ArnavBalyan]

cc @JingsongLi thanks!

[JingsongLi]

+1