fix: [2.5][RESTFUL] Return error when writer body closed (#41184)

Cherry-pick from master
pr: #41183
Related to #41181

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>

internal/distributed/proxy/httpserver/timeout_middleware.go

@@ -25,6 +25,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/cockroachdb/errors"
 	"github.com/gin-gonic/gin"
 
 	mhttp "github.com/milvus-io/milvus/internal/http"
@@ -81,7 +82,7 @@ func NewWriter(w gin.ResponseWriter, buf *bytes.Buffer) *Writer {
 // Write will write data to response body
 func (w *Writer) Write(data []byte) (int, error) {
 	if w.timeout || w.body == nil {
-		return 0, nil
+		return 0, errors.New("Response writer closed")
 	}
 
 	w.mu.Lock()