enhance: [skip e2e]remove-old-builder (#29384)

Signed-off-by: Sammy Huang <sammy.huang@zilliz.com>

.github/workflows/publish-builder.yaml

@@ -58,7 +58,16 @@ jobs:
         run: |
           docker run --rm --privileged tonistiigi/binfmt:latest --install arm64
           docker buildx ls
+
+          # Check if the builder named "milvus" exists
+          if docker buildx ls | grep -q "milvus"; then
+              echo "Builder 'milvus' already exists. Skipping creation."
+          else
+              # Create the builder named "milvus"
+              echo "Creating builder named 'milvus'..."
               docker buildx create --use --name=milvus --driver docker-container
+              echo "'milvus' builder created."
+          fi
       - name: Docker Build
         if: success() && github.event_name == 'pull_request' && github.repository == 'milvus-io/milvus'
         shell: bash