Apply Rails/HasAndBelongsToMany rubocop rule

We were using it everywhere except in one place.

.rubocop.yml

@@ -15,9 +15,6 @@ Performance/EndWith:
 Performance/StartWith:
   Enabled: true
 
-Rails/HasAndBelongsToMany:
-  Enabled: true
-
 Rails/HasManyOrHasOneDependent:
   Enabled: true
 

.rubocop_basic.yml

@@ -206,6 +206,9 @@ Rails/FindEach:
 Rails/HttpPositionalArguments:
   Enabled: true
 
+Rails/HasAndBelongsToMany:
+  Enabled: true
+
 Rails/InverseOf:
   Enabled: true
   Exclude:

app/models/geozones_poll.rb

@@ -0,0 +1,4 @@
+class GeozonesPoll < ApplicationRecord
+  belongs_to :geozone
+  belongs_to :poll
+end

app/models/poll.rb

@@ -27,7 +27,8 @@ class Poll < ApplicationRecord
   has_many :comments, as: :commentable, inverse_of: :commentable
   has_many :ballot_sheets
 
-  has_and_belongs_to_many :geozones
+  has_many :geozones_polls
+  has_many :geozones, through: :geozones_polls
   belongs_to :author, -> { with_hidden }, class_name: "User", inverse_of: :polls
   belongs_to :related, polymorphic: true
   belongs_to :budget