Optimize NOT IN and != predicates for single-value files

[joyhaldar]

Summary

This PR adds file pruning optimization for NOT IN and != predicates when a file contains a single distinct value (i.e., when min == max).

Problem

Currently, InclusiveMetricsEvaluator cannot prune files for NOT IN and != predicates, even when the file provably contains no matching rows.

Solution

When min == max and the file has no nulls, we can safely prune if:

• For NOT IN: the single value is in the exclusion list
• For !=: the single value equals the literal

Testing

• Added unit tests for both notIn and notEq optimizations
• Verified correct behavior with nulls (must scan) and without nulls (can prune)

Fixes #14592