Make JH Gitlab purchase from CustomerDot only

Background

Gitlab already migrated a lot of purchase flows to the SaaS instance. we think if we doing the same thing, the effort is big for us. so we want to let the user redirect to CustomerDot, and finish the purchase flow on customerDot only. And one day, when you guys migrated everything to SaaS, we may synchronize with you guys.

Proposal

I read the code, I think we just overwrite that method in JH module. and let it always return false.

https://gitlab.com/gitlab-jh/gitlab/-/blob/main-jh/ee/app/helpers/billing_plans_helper.rb#L53-59

  # currently
  def use_new_purchase_flow?(namespace)
    # new flow requires the user to already have a last name.
    # This can be removed once https://gitlab.com/gitlab-org/gitlab/-/issues/298715 is complete.
    return false unless current_user.last_name.present?

    namespace.group? && (namespace.actual_plan_name == Plan::FREE || namespace.trial_active?)
  end


  # jh
  def use_new_purchase_flow?(namespace)
    false    
  end

Please help to check if it's OK