[7.x] [kbn-storybook] Update Storybook to 5.3.19 (#73320)#73671

clintandrewhall merged 3 commits intoelastic:7.xelastic/kibana:7.xfrom

clintandrewhall:backport/7.x/pr-73320clintandrewhall/kibana:backport/7.x/pr-73320Copy head branch name to clipboard