By Layli Foroudi PARIS (Reuters) – A fiercely contested immigration bill violates France’s constitutional commitment to equality and liberty, the U.N. special rapporteur on racism said, amid nationwide protests against the legislation that is backed by far-right lawmakers. President Emmanuel Macron has made the bill a key plank of his second term but has been embarrassed by the support it drew from his arch rival, Marine Le Pen’s far-right National Rally party, and referred the legislation to France’s Constitutional Council to check if it complies with the constitution. The Council is due to a…