Update deployctl output to note demos

[rileyhgrant]

Makes a minor modification to the deployctl deployments list command to note when local and cluster deployments are going to be/are deployed using auto scaling demo pool.

This was a minor thing I wanted, I figure just open the PR and if we don't want it, we don't have to merge it.

Output with this PR's changes:

❯ ./deployctl deployments list


Local configurations
====================
v4p1-gtex-pext-demo (demo)
blue
green

Cluster deployments
===================
new-str-dev-api
example-query-docs
vrs-quality-measures (demo)
fix-african-lai
green
blue
v4p1-gtex-pext-demo (demo)

Output previously:

❯ ./deployctl deployments list


Local configurations
====================
v4p1-gtex-pext-demo
blue
green

Cluster deployments
===================
new-str-dev-api
example-query-docs
vrs-quality-measures
fix-african-lai
green
blue
v4p1-gtex-pext-demo