Support for an avro table reader

[alamb]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
Avro is another (row oriented) storage format such as CSV, or JSON. arrow-rs includes (optional) features for reading those formats, and we could also contemplate reading avro as well.

In apache/datafusion#910 @Igosuki implemented avro support for DataFusion and @nevi-me suggested apache/datafusion#910 (comment) this might belong in arrow-rs if there was sufficient interest

Describe the solution you'd like
An AvroReader, similar to CsvReader and JsonReader in arrow-rs

Describe alternatives you've considered
Leave the code in DataFusion

[Igosuki]

There would be a good opportunity for refactoring here as well, and enabling custom formats to be easily implemented.

[alamb]

Dupe of #4886 which is in progress (thanks @Jefffrey ).