[C++] Reading and Writing RLE data from/to Parquet

Parquet already supports RLE data. So this would involve adding a new (optional) code path that this data can be directly read into the new Arrow RLE arrays, without decoding it.

**Reporter**: [Tobias Zagorni](https://issues.apache.org/jira/browse/ARROW-17028) / @zagto

_{**Note**: *This issue was originally created as [ARROW-17028](https://issues.apache.org/jira/browse/ARROW-17028). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}