By Martin Coulter LISBON (Reuters) – Lisbon will this week play host to Europe’s biggest annual tech conference, Web Summit, where industry leaders and lawmakers will weigh the pros and cons of Donald Trump’s return to the White House.  Senior executives from firms such as Apple (NASDAQ:), Microsoft (NASDAQ:), and Meta (NASDAQ:) will join high-ranking officials from Europe for debates about the future of artificial intelligence, social media regulation, and