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

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

plugins/config-schema/package.json

@@ -47,7 +47,6 @@
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^12.1.3",
     "@testing-library/user-event": "^14.0.0",
-    "@types/jest": "^26.0.7",
     "@types/node": "^16.11.26",
     "cross-fetch": "^3.1.5",
     "msw": "^0.47.0"