Hong Kong’s Cathay Pacific has grounded two-fifths of its passenger fleet for the “foreseeable future”, warning it will not survive Covid-19 unless it restructures and adapts for a post-pandemic future.Executive director Ronald Lam Siu-por on Monday said it was clear the 73-year-old airline was “facing a long and uncertain road to recovery” as it planned a sweeping restructuring that could be unveiled as soon as next month.The beleaguered flag carrier revealed that its planes were flying at…