add new flag in order to be able to indicate whether the datasource has native support for tables

pkg/plugins/datasource_plugin.go

@@ -24,6 +24,7 @@ type DataSourcePlugin struct {
 	Metrics      bool              `json:"metrics"`
 	Alerting     bool              `json:"alerting"`
 	Explore      bool              `json:"explore"`
+	Table        bool              `json:"tables"`
 	Logs         bool              `json:"logs"`
 	QueryOptions map[string]bool   `json:"queryOptions,omitempty"`
 	BuiltIn      bool              `json:"builtIn,omitempty"`