use automatic doc upload instead of seperate job (#7567)

.github/workflows/docs.yml

@@ -14,7 +14,6 @@ jobs:
     uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
     with:
       repository: pytorch/vision
-      upload-artifact: docs
       script: |
         set -euo pipefail
 
@@ -40,29 +39,9 @@ jobs:
         pip install --progress-bar=off -r requirements.txt
         echo '::endgroup::'
         
-        echo '::group::Build HTML docs'
-        # The runner does not have sufficient memory to run with as many processes as their are
+        # The runner does not have sufficient memory to run with as many processes as there are
         # cores (`-j auto`). Thus, we limit to a single process (`-j 1`) here.
         sed -i -e 's/-j auto/-j 1/' Makefile
         make html
-        echo '::endgroup::'
         
-        mv build/html "${RUNNER_ARTIFACT_DIR}"
-
-  upload-preview:
-    if: github.event_name == 'pull_request'
-    needs: [build]
-    runs-on: [self-hosted, linux.2xlarge]
-    steps:
-      - uses: actions/download-artifact@v3
-        with:
-          name: docs
-
-      - name: Upload docs preview
-        uses: seemethere/upload-artifact-s3@v5
-        with:
-          retention-days: 14
-          s3-bucket: doc-previews
-          if-no-files-found: error
-          path: html
-          s3-prefix: pytorch/vision/${{ github.event.pull_request.number }}
+        mv build/html/* "${RUNNER_DOCS_DIR}"