RAYA AND THE LAST DRAGON: 3 ½ STARS If you look on IMDb, there are dozens of titles containing the phrase “dragon slayer.” Movie dragons, by and large have been of the Smaug variety, a beast “The Hobbit” author J.R.R. Tolkien described as “a most specially greedy, strong and wicked worm.” There are exceptions of course, like the “How to Train Your Dragon” creatures and the wyvern in “The Reluctant Dragon” who would rather recite poetry than cause havoc. “You’ve got to be mad to breathe fire,” he says, “but I’m not mad at anybody.” This week we can add Sisu the self-deprecating water dragon voiced by Awkwafina in Disney+’s animated “Raya and the Last Dragon,” to the happy dragon list