Support an "Update All Local Modules" scenario

[JustinGrote]

We should support the following pattern:

Get-Module -ListAvailable | Update-ModuleFast

If we detect a standard module path is provided to us, we should translate that into a modulespec as follows:

1. Versions greater than what was provided up to the next major version
2. Implied -Update in this regard
3. Display "Module Not Found" in the gallery as a warning rather than a hard stop.
4. If -Update is explicitly specified, then the major version restrictions are lifted.

This should probably also come after multi-repo support.