Allow frontend-dev-utils in dependency verification exceptions

Add @backstage/frontend-dev-utils to the except list for the rule
that prevents web-library packages from depending on frontend-plugin
packages, since it legitimately wraps @backstage/plugin-app for
development environments.

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

scripts/verify-local-dependencies.js

@@ -62,6 +62,7 @@ const roleRules = [
       // TODO(freben): Address these
       '@backstage/frontend-defaults',
       '@backstage/frontend-app-api',
+      '@backstage/frontend-dev-utils',
       '@backstage/frontend-test-utils',
       '@backstage/plugin-api-docs',
       '@backstage/plugin-techdocs-addons-test-utils',