Refactor HostVersion into its own class and use it everywhere host
artifacts are created. This includes the
- host nuget packages
- host installers (msi, pkg, deb)
Earlier the host MSI dependency key changed for every version. Therefore
the following stesp uninstalled host aggresively.
- Install a older dotnet CLI bundle (say v1)
- Install a newer dotnet CLI bundle (say v2)
- Uninstall the newer CLI bundle. This removes the host completely and
leaves the older version v1 unusable.
With this fix all the versions of the CLI in the machine will reference
count the host correctly.
Fixes - #2713
