cleanup: add more logging in blobfuse-proxy when blobfuse2 not found

Author: andyzhangx

pkg/blobfuse-proxy/server/server.go

@@ -95,6 +95,9 @@ func (server *MountServer) MountAzureBlob(_ context.Context,
 	output, err := cmd.CombinedOutput()
 	if err != nil {
 		klog.Error("blobfuse mount failed: with error:", err.Error())
+		if strings.Contains(err.Error(), "executable file not found") {
+			klog.Error("os.Environ: %v", os.Environ())
+		}
 	} else {
 		klog.V(2).Infof("successfully mounted")
 	}