Blocker during installing with installer

### What Operating System(s) are you seeing this problem on?

macos (aarch64)

### Backend.AI version

latest

### Describe the bug

When you install with https://bnd.ai/installer-stable-macos-aarch64, on code line https://github.com/lablup/backend.ai/blob/a620a8c18c778dfeadb4cda30e8b0c2d377c4b92/src/ai/backend/agent/docker/kernel.py#L613 , you will get error like `[Errno 2] No such file or directory: '/tmp/backend.ai/linuxkit-metadata-proxy'` because there is no directory as /tmp/backend.ai.
you can fix it with `mkdir -p /tmp/backend.ai` but it would be hard to figure out.

### To Reproduce

_No response_

### Expected Behavior

_No response_

### Anything else?

_No response_