[C++] Rename json.h #20584
Description
This JSON format is mostly used for integration testing, it's not meant for outside consumption. Perhaps rename the header to json-integration.h?
Reporter: Antoine Pitrou / @pitrou
Assignee: Antoine Pitrou / @pitrou
PRs and other links:
Note: This issue was originally created as ARROW-3981. Please see the migration documentation for further details.