Multiple "All Data (CSV)" Exports contain extra lines

[gdprdatasubect]

NetBox version

v3.6.6

Python version

3.8

Steps to Reproduce

1. Create at least two devices, one containing a rear port, one containing an interface
2. Connect the rear port to an interface
3. Navigate to dcim/rear-ports/ ; use filters if you want to
4. Export via "Export" -> "All Data (CSV)"
5. Notice that the file contains extra lines where the ">" was probably not handled correctly:
   
   (Optional: 6. Be annoyed enough by the bug to write a report)

Expected Behavior

No extra lines

Observed Behavior

Lines added

[gdprdatasubect]

It just came to my mind to try the other way around too…
dcim/interfaces "All Data (CSV)"-exports are broken worse:

[jeremystretch]

To be clear, the exported CSV here is valid; the issue is the errant line breaks present in the link_peers column values. We probably need to add a value() method to the table column to handle plaintext export in addition to the HTML rendering employed by the UI (which includes a right-angle bracket icon).