arrow

ARROW-9630: [Go] Implement public JSON reader/writer

This JSON reader/writer is intended to support the standard Go encoding/json package for Go and writes out arrays and records as data, not as the integration format. This implements `MarshalJSON` for the array types, and `UnmarshalJSON` for the array builders (in order to unmarshal json data to add to an existing builder) along with providing a few helper functions for single array from json or single recordbatch from json logic.

Closes #11359 from zeroshade/arrow-9630-json-rw

Authored-by: Matthew Topol <mtopol@factset.com>
Signed-off-by: Matthew Topol <mtopol@factset.com>