Lea Michele seems to be irreplaceable. In 2022, she stepped into “Funny Girl,” reversing the fortunes of that flagging show. Sales soared, and when she was done, the production closed. Now she is starring in a revival of “ Chess ,” and the producers of that show have likewise opted to close up shop when she departs. The move, announced on Tuesday evening, is a change of plans. The “Chess” producers announced in March that Michele would be replaced by the singer-songwriter Joanna Levesque (known