By Tassilo Hummel and Sudip Kar-Gupta PARIS (Reuters) -President Emmanuel Macron could lose his outright majority in France’s parliament and the ability to push through his economic reform agenda with a free hand after a strong showing by a new left-wing alliance in the first round of voting. Macron’s centrist alliance and the NUPES coalition led by the hardleft veteran Jean-Luc Melenchon each won 26% of the vote amid record abstentions on Sunday, though it is the June 19 second round alone that will determine the division of seats. Elabe projected Macron’s Ensemble! alliance would win between…