ALMATY (Reuters) – Kazakhstan votes on a constitutional reform on Sunday promoted by President Kassym-Jomart Tokayev as a step toward liberalising the Central Asian republic, though it would still leave key powers in his hands. The reform is likely to Tokayev, 69, the political capital he needs to run for a second term in oil-rich Kazakhstan, this time without the backing of his former patron and predecessor Nursultan Nazarbayev. Although in power since 2019 following Nazarbayev’s abrupt resignation after three decades in power, Tokayev has only fully emerged as an independent figure this year…