public dashboards: move into into its own service (#51358)

This PR moves public dashboards into its own self contained service including API, Service, Database, and Models. Routes are mounted on the Grafana HTTPServer by the API service at injection time with wire.go. The main  route that loads the frontend for public dashboards is still handled by the API package.

Co-authored-by: Jesse Weaver <jesse.weaver@grafana.com>
Co-authored-by: Owen Smallwood <owen.smallwood@grafana.com>

pkg/api/http_server.go

@@ -62,6 +62,8 @@ import (
 	pluginSettings "github.com/grafana/grafana/pkg/services/pluginsettings/service"
 	pref "github.com/grafana/grafana/pkg/services/preference"
 	"github.com/grafana/grafana/pkg/services/provisioning"
+
+	publicdashboardsApi "github.com/grafana/grafana/pkg/services/publicdashboards/api"
 	"github.com/grafana/grafana/pkg/services/query"
 	"github.com/grafana/grafana/pkg/services/queryhistory"
 	"github.com/grafana/grafana/pkg/services/quota"
@@ -163,6 +165,7 @@ type HTTPServer struct {
 	folderPermissionsService     accesscontrol.FolderPermissionsService
 	dashboardPermissionsService  accesscontrol.DashboardPermissionsService
 	dashboardVersionService      dashver.Service
+	PublicDashboardsApi          *publicdashboardsApi.Api
 	starService                  star.Service
 	CoremodelRegistry            *registry.Generic
 	CoremodelStaticRegistry      *registry.Static
@@ -202,7 +205,7 @@ func ProvideHTTPServer(opts ServerOptions, cfg *setting.Cfg, routeRegister routi
 	teamsPermissionsService accesscontrol.TeamPermissionsService, folderPermissionsService accesscontrol.FolderPermissionsService,
 	dashboardPermissionsService accesscontrol.DashboardPermissionsService, dashboardVersionService dashver.Service,
 	starService star.Service, csrfService csrf.Service, coremodelRegistry *registry.Generic, coremodelStaticRegistry *registry.Static,
-	kvStore kvstore.KVStore, secretsMigrator secrets.Migrator, remoteSecretsCheck secretsKV.UseRemoteSecretsPluginCheck,
+	kvStore kvstore.KVStore, secretsMigrator secrets.Migrator, remoteSecretsCheck secretsKV.UseRemoteSecretsPluginCheck, publicDashboardsApi *publicdashboardsApi.Api,
 ) (*HTTPServer, error) {
 	web.Env = cfg.Env
 	m := web.New()
@@ -287,6 +290,7 @@ func ProvideHTTPServer(opts ServerOptions, cfg *setting.Cfg, routeRegister routi
 		CoremodelRegistry:            coremodelRegistry,
 		CoremodelStaticRegistry:      coremodelStaticRegistry,
 		kvStore:                      kvStore,
+		PublicDashboardsApi:          publicDashboardsApi,
 		secretsMigrator:              secretsMigrator,
 	}
 	if hs.Listener != nil {