Type also changed from boolean to string

Still remove an existing cnfsId when no meeting opened. 
No more 429 risks since it works now with one call to https://api.conseiller-numerique.gouv.fr/permanences.

Remove an existing cnfsID when not matching espace coop or rdvs meeting list. Call rdvs api when a match is found on espace coop to avoid too many request.

 Warning  : rdvs api might throw a 429 error when above 50 requests.