Introduce the ability to export taxonomy term names instead of entity ID

Problem/Motivation

There was a request from the team consuming the exported CSVs to export the name of a referenced taxonomy term rather than the "target_id" of the referenced entity (term). This was understandable, as the team found it challenging to work with the TID of the term rather than the term name itself.

I wrote a small patch to the existing functionality to print the name if the target entity is a "taxonomy_term."

Happy to tweak the approach if that is desired!