AVRO-3344 Deprecating DataBlock (#1494)
AVRO-3344 Deprecating DataBlock (#1494)

Co-authored-by: Kyle T. Schoonover <974d0df5862281c023a0416b1766f876df65059c@nordstrom.com>
apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro