Variant write-path features

[AdamGS]

This is a tracking issue for more sophisticated write-path features for Variant.

Motivation

Shredding variant arrays can be done in many ways and is an active research topic.

Steps

• Convert JSON or similar data into Variant arrays - including shredding Add JSON to Parquet Variant conversion with shredding #8391

Unresolved questions

1. How do we define JSON? To we want JSON-specific functions?

Relevant resources

https://db.in.tum.de/~durner/papers/json-tiles-sigmod21.pdf

Implementation history

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