Export Saved Filter does not include parameters

[FliesLikeABrick]

NetBox version

v3.4.5

Python version

3.10

Steps to Reproduce

1. Browse to /extras/saved-filters with at least one saved filter defined
2. Export saved filters to CSV via "Export" > "All Data (CSV)"
3. Observe that the CSV does not contain the "parameters" field which is the core data to define/import/clone a saved filter

Expected Behavior

We would expect that the data export contains the "parameters" JSON, as this is the core value of the saved filter (all other fields are effectively metadata/housekeeping)

Observed Behavior

The parameters of the saved filter are not present in the export, meaning their subsequent import into NetBox would be incomplete. Parameters is a required field for import, we would expect it to be present in the export.

[FliesLikeABrick]

With a little bit of pointers towards the right part of the code base, I'm happy to open a PR for this.