Enable Parquet filter pushdown by default

[andygrove]

What is the problem the feature request solves?

I would like to enable Parquet filter pushdown config COMET_RESPECT_PARQUET_FILTER_PUSHDOWN by default. However, this currently results in poor performance with TPC-H.

Describe the potential solution

No response

Additional context

No response

[mbutrovich]

Q6 seems like a good target. I'll try to find time to profile it today.