Public Dashboards: Disable email-sharing when there is no license (#80887)

* PublicDashboards: Disable email-shared dashboards when feature is disabled

* fix pubdash creation when it was email-shared

* add feature name const in OSS

* update doc

* Update service.go

* fix test & linter

* fix test

* Update query_test.go

* update tests

* fix imports

* fix doc linter issues

* Update docs/sources/administration/enterprise-licensing/_index.md

* fix after merge

pkg/services/publicdashboards/api/api.go

@@ -14,6 +14,7 @@ import (
 	contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
 	"github.com/grafana/grafana/pkg/services/dashboards"
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
+	"github.com/grafana/grafana/pkg/services/licensing"
 	"github.com/grafana/grafana/pkg/services/publicdashboards"
 	. "github.com/grafana/grafana/pkg/services/publicdashboards/models"
 	"github.com/grafana/grafana/pkg/services/publicdashboards/validation"
@@ -28,6 +29,7 @@ type Api struct {
 	accessControl accesscontrol.AccessControl
 	cfg           *setting.Cfg
 	features      featuremgmt.FeatureToggles
+	license       licensing.Licensing
 	log           log.Logger
 	routeRegister routing.RouteRegister
 }
@@ -39,6 +41,7 @@ func ProvideApi(
 	features featuremgmt.FeatureToggles,
 	md publicdashboards.Middleware,
 	cfg *setting.Cfg,
+	license licensing.Licensing,
 ) *Api {
 	api := &Api{
 		PublicDashboardService: pd,
@@ -46,6 +49,7 @@ func ProvideApi(
 		accessControl:          ac,
 		cfg:                    cfg,
 		features:               features,
+		license:                license,
 		log:                    log.New("publicdashboards.api"),
 		routeRegister:          rr,
 	}
@@ -158,8 +162,8 @@ func (api *Api) GetPublicDashboard(c *contextmodel.ReqContext) response.Response
 		return response.Err(err)
 	}
 
-	if pd == nil {
-		response.Err(ErrPublicDashboardNotFound.Errorf("GetPublicDashboard: public dashboard not found"))
+	if pd == nil || (!api.license.FeatureEnabled(FeaturePublicDashboardsEmailSharing) && pd.Share == EmailShareType) {
+		return response.Err(ErrPublicDashboardNotFound.Errorf("GetPublicDashboard: public dashboard not found"))
 	}
 
 	return response.JSON(http.StatusOK, pd)