docs: clarify usage message for runtime commands

[federicobozzini]

Changes

• Usage messages mention <ID>. EG:

$ remoteproc-runtime create
Error: accepts 1 arg(s), received 0
Usage:
  container-runtime create <ID> [flags]

In some cases it might not be obvious what ID is required.

runc uses <container-id> that is more obvious.

runc create
Incorrect Usage.

NAME:
   runc create - create a container

USAGE:
   runc create [command options] <container-id>

This PR renames ID to container-id for clarity and consistency.

Checklist

• 🤖 This change is covered by tests as required.
• 🤹 All required manual testing has been performed.
• 📖 All documentation updates are complete.

[muchzill4]

👍