CI: Upload docs artifact in tar format

Instead of the format intended for ghpages, upload an artifact in prep
to place on S3.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

.github/workflows/docs.yml

@@ -45,35 +45,28 @@ jobs:
         run: |
           # Note that the above build doesn't set Zephyrbase, so we'll need to do that here.
           west build -t rustdoc -b nrf52840dk/nrf52840 docgen
-          mkdir docout
-          mv build/rust/target/thumbv7em-none-eabi/doc docout/nostd
-          cp docs/top-index.html docout/index.html
+          mkdir rustdocs
+          mv build/rust/target/thumbv7em-none-eabi/doc rustdocs/nostd
+          cp docs/top-index.html rustdocs/index.html
 
       - name: Build build documentation
         working-directory: zephyr-rust-lang
         run: |
           cd zephyr-build
           cargo doc
-          mv target/doc ../docout/std
+          mv target/doc ../rustdocs/std
+
+      - name: Compress docs
+        run: |
+          tar --use-compress-program="xz -T0" -cf rustdocs.tar.xz rustdocs
+
+      - name: upload-build
+        uses: actions/upload-artifact@v4
+        with:
+          name: rustdocs
+          path: rustdocs.tar.xz
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
           path: zephyr-rust-lang/docout
-
-  deploy:
-    needs: generate-docs
-    permissions:
-      pages: write
-      id-token: write
-
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4