Dataproc - September 13th, 2021 [Change, Fix]

## Change New [sub-minor versions](https://cloud.google.com/dataproc/docs/concepts/versioning/dataproc-versions) of Dataproc images: `1.4.71-debian10`, `1.4.71-ubuntu18`, `1.5.46-centos8`, `1.5.46-debian10`, `1.5.46-ubuntu18`, `2.0.20-centos8`, `2.0.20-debian10`, `2.0.20-ubuntu18` ## Change Added support for enabling/disabling Ubuntu Snap daemon with cluster property [dataproc:dataproc.snap.enabled](https://cloud.google.com/dataproc/docs/concepts/configuring-clusters/cluster-properties#service%5Fproperties). The default value is "true". If set to "false", pre-installed Snap packages in the image won't be affected, but auto refresh will be disabled. **Applies to all Ubuntu images.** ## Fix [HIVE-21018](https://issues.apache.org/jira/browse/HIVE-21018): Grouping/distinct on more than 64 columns should be possible. **Applies to 2.0 images.**