Residents and expatriates in the world’s most expensive city now have a chance to make some big savings on rents.Hong Kong’s embattled serviced apartment operators are slashing rents, in some cases, by as much as half, and offering sweeteners to boost occupancy rates that have been hit hard by travel restrictions and a sharp decline in relocations because of the coronavirus pandemic.“Whilst hotels can entice locals with attractive staycation packages, serviced apartments rely heavily on…