Do Articles 168 and 169(a) of Council Directive 2006/112/EC not preclude, in the case of a branch registered for VAT purposes in one Member State and carrying out mainly intra-company transactions for a parent company established in another Member State and occasionally also transactions taxable in the State where the branch is registered, the taxable person from being entitled to deduct input tax in the State in which the branch is registered, despite the fact that the tax is linked to transactions carried out by the parent company in another Member State?