Core Tools should write warning when publishing to Azure if the Host version is lower than the current version (in the Core Tools)

Core Tools should write warning when publishing to Azure if the Host version is lower than the current version (in the Core Tools)

We working on publishing prerelease version of the Core Tools. Users might take a dependency on features that are not yet available in the backend. To make the user aware of this, we should write a warning.

The Functions host information is available at this end point.
https://.azurewebsites.net/admin/host/status

@VpOfEngineering @amamounelsayed @khkh-ms @soninaren