Add version information to Installation page
Presently we don't show version information for some installation types. This can lead to challenges with installation, when customers attempt to install packages on unsupported OS versions. For example we only support LTS versions of Ubuntu, and if you try to install on others it will generate an error: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/2582
We should add version information to the install page to make clear what is supported.