ci: Add reusable unit test workflow (no-changelog) (#7159)

Github issue / Community forum post (link here to close automatically):

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

.github/workflows/ci-pull-requests.yml

@@ -34,38 +34,11 @@ jobs:
 
   unit-test:
     name: Unit tests
-    runs-on: ubuntu-latest
+    uses: ./.github/workflows/units-tests-reusable.yml
     needs: install
-    steps:
-      - uses: actions/checkout@v3.5.3
-        with:
-          repository: n8n-io/n8n
-          ref: ${{ inputs.branch }}
-
-      - uses: pnpm/action-setup@v2.4.0
-
-      - name: Use Node.js 18
-        uses: actions/setup-node@v3.7.0
-        with:
-          node-version: 18.x
-          cache: pnpm
-
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
-
-      - name: Restore cached build artifacts
-        uses: actions/cache/restore@v3.3.1
-        with:
-          path: ./packages/**/dist
-          key: ${{ github.sha }}-base:18-test-lint
-
-      - name: Test
-        run: pnpm test
-
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
-        with:
-          files: packages/@n8n/client-oauth2/coverage/cobertura-coverage.xml,packages/cli/coverage/cobertura-coverage.xml,packages/core/coverage/cobertura-coverage.xml,packages/design-system/coverage/cobertura-coverage.xml,packages/editor-ui/coverage/cobertura-coverage.xml,packages/nodes-base/coverage/cobertura-coverage.xml,packages/workflow/coverage/cobertura-coverage.xml
+    with:
+      ref: ${{ github.event.pull_request.head.ref }}
+      cacheKey: ${{ github.sha }}-base:18-test-lint
 
   lint:
     name: Lint changes