Allow instructeur to have multiple agent_connect_information

AC will return two different sub depending of the domain demarches.gouv.fr or ds.
Both agent_connect_information are stored and the corresponding instructeur is found by its email.
We do not store anymore the agent_connect_id on the instructeur as the are many.

app/models/instructeur.rb

@@ -1,8 +1,10 @@
 class Instructeur < ApplicationRecord
+  self.ignored_columns += [:agent_connect_id]
+
   include UserFindByConcern
   has_and_belongs_to_many :administrateurs
 
-  has_one :agent_connect_information, dependent: :destroy
+  has_many :agent_connect_information, dependent: :destroy
 
   has_many :assign_to, dependent: :destroy
   has_many :groupe_instructeurs, -> { order(:label) }, through: :assign_to