Merge utils from Parquet and Arrow

[alamb]

Note: migrated from original JIRA: https://issues.apache.org/jira/browse/ARROW-4064

Currently we maintain two set of utils, one in Parquet and one in Arrow. We should merge them and create a top level module for both components.

[alamb]

Comment from Neville Dipale(nevi_me) @ 2019-12-11T17:44:30.019+0000:

Is this still worth doing? My view is that there's little overlap in the various utils.