…yarrow` and `parquet-variant` (apache#7745)Note this targets a release branch, not mainI have a different proposed fix for `main`:-apache#7742I will also make a fix for parquet-variant test failures# Which issue does this PR close?- Related toapache#7394- Related toapache#7736- Related toapache#7746# Rationale for this change`cargo test --all` requires python and pyarrow installed, where it didnot in previous versions of arrow due to breaking out `arrow-pyarrow`into its own crate in-apache#7694Also the new `parquet-variant` crate tests fail as part of theverification script too -- seettps://github.com/apache/issues/7746In order to get a script that can automatically verify a releasecandidate, let's ignore this new module for now.More details -apache#7736 -apache#7742Note that the arrow-pyarrow tests do run as part of CI and succeed onthis branch# What changes are included in this PR?1. Exclude running the `arrow-pyarrow` and `parquet-variant` tests aspart of `verify-release-acndidate`# TestingI verified locally that `./dev/release/verify-release-candidate.sh55.2.0 1` passes with this script# Are there any user-facing changes?No this is a development process only change

# Which issue does this PR close?None# Rationale for this changeI need access to the writer so that I can flush an external buffer whenbytes are written.# What changes are included in this PR?A couple of methods to the JSON writer. These methods already exist onother writers# Are these changes tested?N/A# Are there any user-facing changes?Yes, a couple extra methods on the JSON writer.---------Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>