persist: Wire Parquet dictionary encoding and compression to LaunchDarkly

[ParkMyCar]

This PR adds two dyncfgs for Parquet encoding, one to enable dictionary encoding and a second to enable compression.

Motivation

• This PR adds a feature that has not yet been specified.

Parquet supports dictionary encoding and compression which can both seriously reduce the size of the encoded data. We need to run benchmarks to determine if we should enable these features, adding these dyncfgs is the first step in doing that.

Checklist

• This PR has adequate test coverage / QA involvement has been duly considered. (trigger-ci for additional test/nightly runs)
• This PR has an associated up-to-date design doc, is a design doc (template), or is sufficiently small to not require a design.
• If this PR evolves an existing $T ⇔ Proto$T mapping (possibly in a backwards-incompatible way), then it is tagged with a T-proto label.
• If this PR will require changes to cloud orchestration or tests, there is a companion cloud PR to account for those changes that is tagged with the release-blocker label (example).
• This PR includes the following user-facing behavior changes:
  • N/a

[danhhz]

We should circle back and remove some of the compile time deps once we settle on something, but otherwise LGTM