fix: Round 9 - Use direct GCS URL for kubebuilder test tools

The kubebuilder.io URL returns a 302 redirect that curl -sSL is not
following correctly, causing "tar: This does not look like a tar archive"
errors.

Changed to use the direct Google Cloud Storage URL:
https://storage.googleapis.com/kubebuilder-tools/kubebuilder-tools-VERSION-linux-amd64.tar.gz

This ensures we get the actual tar.gz file instead of a redirect response.
Also restored -z flag since we now know it's definitely gzipped.

Files modified:
- .github/workflows/test.yml (lines 181-184)
- .github/workflows/reusable/build-test.yml (lines 92-94)

Related: #CI-fixes

Author: thc1006

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

@@ -88,9 +88,10 @@ jobs:
         echo "Setting up test environment for ${{ inputs.test-type }} tests..."
 
         # Download and extract kubebuilder test binaries
-        curl -sSLo envtest-bins.tar.gz "https://go.kubebuilder.io/test-tools/1.31.1/linux/amd64"
+        # Use direct GCS URL to avoid redirect issues
+        curl -sSLo envtest-bins.tar.gz "https://storage.googleapis.com/kubebuilder-tools/kubebuilder-tools-1.31.1-linux-amd64.tar.gz"
         mkdir -p /tmp/kubebuilder/bin
-        tar -C /tmp/kubebuilder --strip-components=1 -xvf envtest-bins.tar.gz
+        tar -C /tmp/kubebuilder --strip-components=1 -xzf envtest-bins.tar.gz
 
         echo "KUBEBUILDER_ASSETS=/tmp/kubebuilder/bin" >> $GITHUB_ENV
         echo "USE_EXISTING_CLUSTER=false" >> $GITHUB_ENV

.github/workflows/test.yml

@@ -178,9 +178,10 @@ jobs:
         echo "Setting up Kubernetes test environment for ${{ matrix.component.name }}"
 
         # Download and extract kubebuilder binaries
-        curl -sSLo envtest-bins.tar.gz "https://go.kubebuilder.io/test-tools/${{ env.K8S_VERSION }}/linux/amd64"
+        # Use direct GCS URL to avoid redirect issues
+        curl -sSLo envtest-bins.tar.gz "https://storage.googleapis.com/kubebuilder-tools/kubebuilder-tools-${{ env.K8S_VERSION }}-linux-amd64.tar.gz"
         mkdir -p /tmp/kubebuilder/bin
-        tar -C /tmp/kubebuilder --strip-components=1 -xvf envtest-bins.tar.gz
+        tar -C /tmp/kubebuilder --strip-components=1 -xzf envtest-bins.tar.gz
 
         # Set environment variables
         echo "KUBEBUILDER_ASSETS=/tmp/kubebuilder/bin" >> $GITHUB_ENV