Problem/Motivation
When #3124762: Add 'lifecycle' key to .info.yml files is committed, we will have three new non-stable module states. At present there is a visual affordance to experimental modules at admin/modules. But nothing at present for obsolete and deprecated.
Proposed resolution
Promote the non-stable statuses in admin/modules page, optionally even visually
Remaining tasks
User interface changes
The experimental modules confirm page now has title 'Are you sure you want to install non-stable modules?' and lists both experimental and deprecated modules
