Throw error if the connector is not supported for a specific version

[thrilok209]

Currently, if the connector is not found for a version but it's available for another version, it throws "CONNECTOR_NAME is invalid connector" error.

Instead, throw more precious error saying if the connector is completely invalid or just listed for a specific version like "CONNECTOR_NAME is only for DSA v2".

[mierudayo]

It exists but is available only for another version (e.g., "CONNECTOR_NAME is only available for DSA v2.")