Petrous Internal Carotid Artery Aneurysm: Endovascular Treatment with Coils and Flow Diverter Stents of a Large Petrous Internal Carotid Artery Aneurysm Associated with Full-Blown Fibromuscular Dysplasia, and Flow Diverter Reconstruction of the Contralateral Internal Carotid Artery, Followed by the Coil Occlusion of an Aneurysm of the Anterior Communicating Artery, and Balloon Angioplasty of a Left Internal Carotid Artery In-Stent Stenosis, with Good Clinical Outcome