is-compatible: Extend the compatibility check so that it includes the min support version

[sunker]

Currently, the is-compatible checks whether the installed versions of the grafana packages (compile time) are compatible with the latest versions of these packages. Since the plugin is supposed to have compatibility not only within that range, but also from the min supported version of Grafana (as specified in the grafanaDependency prop i plugin.json, we should extend the is-compatible check to start from the min supported version.

This requires a code change here in the levitate repo.