Adds a `-global` flag for stopping multiregion jobs in all regions at
once. Warn the user if they attempt to stop a multiregion job in a single
region.
We mistakenly reference `CONSUL_TOKEN` where we should be using `CONSUL_HTTP_TOKEN`.
There is one case where `CONSUL_TOKEN` is correct - client.mdx there is a list of
default filtered environment variables, which for legacy reasons `CONSUL_TOKEN` will
always be one.
