test(e2e): enforce awscurl smoke prerequisite

.github/workflows/ci.yml

@@ -678,6 +678,19 @@ jobs:
           cache-save-if: 'false'
           install-build-packaging-tools: 'false'
 
+      - name: Set up Python
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
+        with:
+          python-version: "3.12"
+
+      - name: Install awscurl
+        run: |
+          python3 -m pip install --user --upgrade pip "awscurl==0.44"
+          echo "AWSCURL_PATH=$HOME/.local/bin/awscurl" >> "$GITHUB_ENV"
+
+      - name: Verify awscurl
+        run: test -x "$AWSCURL_PATH"
+
       # Download after the cache restore so the freshly built binary from the
       # build job always wins over anything restored into target/debug.
       - name: Download debug binary

crates/e2e_test/src/bucket_policy_check_test.rs

@@ -53,8 +53,7 @@ fn create_user_client(env: &RustFSTestEnvironment, access_key: &str, secret_key:
 async fn test_bucket_policy_authenticated_user() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     init_logging();
     if !crate::common::awscurl_available() {
-        info!("Skipping test_bucket_policy_authenticated_user because awscurl is not available");
-        return Ok(());
+        return Err("awscurl is required for test_bucket_policy_authenticated_user".into());
     }
     info!("Starting test_bucket_policy_authenticated_user...");