ARROW-12203: [C++][Python] Switch default Parquet version to 2.4

[raulcd]

Change the default parquet version to 2.4

[github-actions]

https://issues.apache.org/jira/browse/ARROW-12203

[raulcd]

@jorisvandenbossche @pitrou I am not sure whether there is something else required for this PR. Builds and tests are passing and the default writers are PARQUET 2.4 now.

[pitrou]

@github-actions crossbow submit -g python

[github-actions]

Revision: 2eca30f

Submitted crossbow builds: ursacomputing/crossbow @ actions-5085e1aabd

Task	Status
test-conda-python-3.10
test-conda-python-3.7
test-conda-python-3.7-hdfs-2.9.2
test-conda-python-3.7-hdfs-3.2.1
test-conda-python-3.7-kartothek-latest
test-conda-python-3.7-kartothek-master
test-conda-python-3.7-pandas-0.24
test-conda-python-3.7-pandas-latest
test-conda-python-3.7-spark-v3.1.2
test-conda-python-3.8
test-conda-python-3.8-hypothesis
test-conda-python-3.8-pandas-latest
test-conda-python-3.8-pandas-nightly
test-conda-python-3.8-spark-v3.2.0
test-conda-python-3.9
test-conda-python-3.9-dask-latest
test-conda-python-3.9-dask-master
test-conda-python-3.9-pandas-master
test-conda-python-3.9-spark-master
test-debian-11-python-3
test-fedora-35-python-3
test-ubuntu-20.04-python-3

[pitrou]

Thanks a lot @raulcd for pushing this forward!