fix: Avoid duplicate invitation emails when adding an agent (#9131)

Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
Co-authored-by: Pranav <pranav@chatwoot.com>

app/builders/agent_builder.rb

@@ -16,7 +16,6 @@ class AgentBuilder
   def perform
     ActiveRecord::Base.transaction do
       @user = find_or_create_user
-      send_confirmation_if_required
       create_account_user
     end
     @user
@@ -34,11 +33,6 @@ class AgentBuilder
     User.create!(email: email, name: name, password: temp_password, password_confirmation: temp_password)
   end
 
-  # Sends confirmation instructions if the user is persisted and not confirmed.
-  def send_confirmation_if_required
-    @user.send_confirmation_instructions if user_needs_confirmation?
-  end
-
   # Checks if the user needs confirmation.
   # @return [Boolean] true if the user is persisted and not confirmed, false otherwise.
   def user_needs_confirmation?