[BUG] enablePprof command line option is useless

[j4ckstraw]

What happened:
Take koordlet as example, because it import net/http/pprof, and main goroutine always listen on addr which default is :9316, so we can always fetch pprof from :9316/debug/pprof/xxx

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• App version:
• Kubernetes version (use kubectl version):
• Install details (e.g. helm install args):
• Node environment (for koordlet/runtime-proxy issue):
  • Containerd/Docker version:
  • OS version:
  • Kernal version:
  • Cgroup driver: cgroupfs/systemd
• Others: