chore: Enable the new Rubocop rules (#7122)

fixes: https://linear.app/chatwoot/issue/CW-1574/renable-the-disabled-rubocop-rules

spec/helpers/email_helper_spec.rb

@@ -1,6 +1,6 @@
 require 'rails_helper'
 
-describe EmailHelper, type: :helper do
+describe EmailHelper do
   describe '#normalize_email_with_plus_addressing' do
     context 'when email is passed' do
       it 'normalise if plus addressing is present' do