release-plz2: add release-dry-run job

Author: Firestar99

.github/workflows/ci.yaml

@@ -285,11 +285,21 @@ jobs:
       - name: Run a full build
         run: cargo xtask test-build --rust-gpu-version ${{ matrix.rust-gpu-version }}
 
+  release-dry-run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: install rust-toolchain
+        run: echo "TARGET=$(rustc --print host-tuple)" >> "$GITHUB_ENV"
+      - name: cargo fetch --locked
+        run: cargo fetch --locked --target $TARGET
+      - run: cargo publish --dry-run
+
   # This allows us to have a single job we can branch protect on, rather than needing
   # to update the branch protection rules when the test matrix changes
   test_success:
     runs-on: ubuntu-latest
-    needs: [test, compiletest, difftest, android, lint, cargo-deny, cargo-gpu-os, cargo-gpu-backwards-compat]
+    needs: [test, compiletest, difftest, android, lint, cargo-deny, release-dry-run, cargo-gpu-os, cargo-gpu-backwards-compat]
     # Hack for buggy GitHub Actions behavior with skipped checks: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
     if: ${{ always() }}
     steps:
@@ -302,6 +312,7 @@ jobs:
           [[ "${{ needs.android.result }}" == "success" ]] || exit 1
           [[ "${{ needs.lint.result }}" == "success" ]] || exit 1
           [[ "${{ needs.cargo-deny.result }}" == "success" ]] || exit 1
+          [[ "${{ needs.release-dry-run.result }}" == "success" ]] || exit 1
           [[ "${{ needs.cargo-gpu-os.result }}" == "success" ]] || exit 1
           [[ "${{ needs.cargo-gpu-backwards-compat.result }}" == "success" ]] || exit 1