Fixes #11914 - Add parameters to the SavedFilterTable as an optional field

[kkthxbye-code]

Fixes: #11914

Seems to display decently in the table and in csv export.

[jeremystretch]

My only nit with the export display is that it appears to be raw Python rather than JSON (single quotes vs. double quotes):

Name,Content types,User,Description,Enabled,Shared,ID,Slug,Weight,Created,Last updated,Parameters
Filter1,dcim.site,admin,,True,True,2,filter1,100,2023-03-13 12:18,2023-03-13 12:18,"{'status': ['staging'], 'region_id': ['5']}"

IMO we should ensure that the export data is in some standardized format (ideally JSON) so that it is readily usable by the client.

[kkthxbye-code]

I totally missed that it wasn't JSON, I'll look into exporting as JSON.

[kkthxbye-code]

Made a change, can you check if the solution is the correct way to do it? It results in an export like this:

Name,Content types,User,Description,Enabled,Shared,ID,Slug,Weight,Created,Last updated,Parameters
test,dcim.device,admin,,True,True,1,test,100,2023-03-10 22:44:47,2023-03-10 22:44:47,"{""status"": [""active""], ""role_id"": [""1""], ""site_id"": [""1""]}"

Double quotes are the way the CSV write escapes quotes.