chore(server): hoist deps (#12145)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **Chores**
  - Updated workflow to move the node_modules directory during the build process.
  - Adjusted Prisma client output directory for improved file organization.
  - Removed unused properties from backend server package configuration.

- **Refactor**
  - Simplified type annotations for improved code clarity in test utilities.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/build-images.yml

@@ -253,6 +253,9 @@ jobs:
       - name: Generate Prisma client
         run: yarn workspace @affine/server prisma generate
 
+      - name: Mv node_modules
+        run: mv ./node_modules ./packages/backend/server
+
       - name: Setup Version
         id: version
         uses: ./.github/actions/setup-version