add data_type for bulk user actions

[mmartinic]

https://github.com/intercom/intercom/issues/61654

[mmartinic]

This adds data_type for user bulk job payload

{"items":[{"method":"post","data_type":"user","data":{"user_id":"13","custom_attributes":{"test_string":"from Java SDK BULK"}}}]}

We shouldn't skip response for 202 as response body contains job id in this case

buildFrom will create a data without type set as we don't need that. We have to copy data_type from original item.data

[khalilovcmd]

Just a change to the access specifier of the constructor 👍