Pinterest v5 API Epic.

[budzanowski]

This is the Epic for the Pinterest v5 API migration work:

The integration branch for all of the code work will be pinterest-v5-integration-branch

Tasks

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1. Connect should point to the new connection url in the middleware. #738
   type: enhancement +1
   
2. Connection procedure for v5 should decode and store the incoming data for later use. #743
   type: enhancement +1
   
3. The connection procedure should intercept and store the information portion of the callback data. #745
   type: enhancement +1
   
4. https://github.com/Automattic/connect.woocommerce.com/pull/165
5. V5 api token refresh procedure. #748
   type: enhancement +1
   
6. Add class that allows calling V5 endpoints. #752
   type: enhancement +1
   
7. Complete the onboarding for the user. #757
   type: enhancement +1
   
8. Switch Ads countries to V5 #831
   +0
   
9. Switch Feed operations to V5 #833
   type: enhancement +1
   
10. Switch Feed ingestion/processing status to V5. #853
    type: enhancement +1
    
11. Store refresh token lifetime. #848
    +0
12. Add V3 to V5 update endpoint. #840
    type: enhancement +1
    
13. Add V5 update procedure. #844
    type: enhancement +1
    
14. Display pinterest connection modal in a popover.
15. Add url parameter to the renew call #856
    +0