Solver error message: suggest cabal update

[michaelpj]

Describe the feature request

When the solver fails because a constraint requires a version that is strictly newer than all the available versions, suggest that the user might need to run cabal update.

Additional context

It's obviously hard for cabal to ever know that we're missing a package version, but this situation is pretty suggestive.

Example of a confused user: haskell/haskell-language-server#3771 (comment)

[grayjay]

This looks like a duplicate of #8922.

[michaelpj]

Yep, thanks.