test: add slow proxy to next app for slow storyboard blocking playbac…#1289

cjpillsbury wants to merge 4 commits intomuxinc:mainmuxinc/elements:mainfrom

cjpillsbury:test/slow-storyboard-test-3.8.0cjpillsbury/elements:test/slow-storyboard-test-3.8.0Copy head branch name to clipboard