This commit adds launch modal for guiding users through launching a GCP
instance from their image. This commit also adds unique image name in
the command in the clipboard. That way, users can rebuild the image more
times without worrying about duplicate names. This guidance should be as
helpful to users as possible, so even if they are able to create their
own image name here, we chose it for them for the sake of simplicity.
a9d2ba59a8