switch @types/jest to only be depended on by @backstage/cli

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/app-defaults/package.json

@@ -49,7 +49,6 @@
     "@backstage/test-utils": "^1.2.0-next.1",
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^12.1.3",
-    "@types/jest": "^26.0.7",
     "@types/node": "^16.11.26",
     "@types/react": "^16.13.1 || ^17.0.0"
   },