config --local: disable/remove help text for irrelevant commands

[dberenbaum]

Extracted from #6855 (comment):

machine status shows the machine running status which is decoupled with the original machine config. So no --global/system/project/local for it. But for now, it shows is in the help UI, we need to remove them. Btw, this UI issue also exists in some other machine commands, create, ssh etc. We can create an issue for it.

[karajan1001]

In #6440

Only add, remove, list, and modify needs --local/project/system/global flag.

Remove them in create, destroy, status, ssh.

For rename, the current logic is that. It renames all levels if no level argument is provided. If we provide a special level, it will only affect configs above that level. (ie, only project and local if with a --project flag). I guess we can keep it for now.