PAC and Parties total endpoints broken

[patphongs]

When trying to filter PAC or Parties using the /totals/ endpoint, the only result is Actblue. Even though the count shows 7647 for parties and 7219 for PACs.

https://api.open.fec.gov/v1/totals/pac/?per_page=10&api_key=DEMO_KEY&sort=-receipts&cycle=2020

https://api.open.fec.gov/v1/totals/parties/?per_page=10&api_key=DEMO_KEY&sort=-receipts&cycle=2020

Completion criteria:

• fix endpoint to return all results

• remove committee_type_full filter field because it's not be used for now.

• add backend code for committee_designation_full filter

• add test case