Chore: Refactor quota service (#57586)

* Chore: refactore quota service

* Apply suggestions from code review

pkg/services/dashboards/dashboard.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/quota"
 )
 
 // DashboardService is a service for operating on dashboards.
@@ -77,6 +78,7 @@ type Store interface {
 	ValidateDashboardBeforeSave(ctx context.Context, dashboard *models.Dashboard, overwrite bool) (bool, error)
 	DeleteACLByUser(context.Context, int64) error
 
+	Count(context.Context, *quota.ScopeParameters) (*quota.Map, error)
 	// CountDashboardsInFolder returns the number of dashboards associated with
 	// the given parent folder ID.
 	CountDashboardsInFolder(ctx context.Context, request *CountDashboardsInFolderRequest) (int64, error)