fix: Ensure Login to NGC step works (#2409)

.github/workflows/build-and-test.yml

@@ -35,6 +35,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Login to NGC
+        if: github.event.pull_request.head.repo.full_name == github.repository || github.event_name == 'push'
         run: |
           echo "${{ secrets.NGC_CI_ACCESS_TOKEN }}" | docker login nvcr.io -u '$oauthtoken' --password-stdin
       - name: Define Image Tag