Replace signed in user for identity.requester (#74048)

* Make identity.Requester available at Context

* Clean pkg/services/guardian/guardian.go

* Clean guardian provider and guardian AC

* Clean pkg/api/team.go

* Clean ctxhandler, datasources, plugin and live

* Clean dashboards and guardian

* Implement NewUserDisplayDTOFromRequester

* Change status code numbers for http constants

* Upgrade signature of ngalert services

* log parsing errors instead of throwing error

pkg/services/folder/folderimpl/folder.go

@@ -12,6 +12,7 @@ import (
 	"github.com/grafana/grafana/pkg/infra/db"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
+	"github.com/grafana/grafana/pkg/services/auth/identity"
 	"github.com/grafana/grafana/pkg/services/dashboards"
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/folder"
@@ -280,7 +281,16 @@ func (s *Service) Create(ctx context.Context, cmd *folder.CreateFolderCommand) (
 	dashFolder.SetUID(trimmedUID)
 
 	user := cmd.SignedInUser
-	userID := user.UserID
+	namespaceID, userIDstr := user.GetNamespacedID()
+	if namespaceID == identity.NamespaceAPIKey {
+		s.log.Warn("namespace API key detected, using 0 as user ID", "namespaceID", namespaceID, "userID", userIDstr)
+		userIDstr = "0"
+	}
+	userID, err := identity.IntIdentifier(namespaceID, userIDstr)
+	if err != nil {
+		s.log.Warn("failed to parse user ID", "namespaceID", namespaceID, "userID", userIDstr, "error", err)
+	}
+
 	if userID == 0 {
 		userID = -1
 	}
@@ -763,12 +773,22 @@ func (s *Service) BuildSaveDashboardCommand(ctx context.Context, dto *dashboards
 		}
 	}
 
+	namespaceID, userIDstr := dto.User.GetNamespacedID()
+	if namespaceID == identity.NamespaceAPIKey {
+		s.log.Warn("namespace API key detected, using 0 as user ID", "namespaceID", namespaceID, "userID", userIDstr)
+		userIDstr = "0"
+	}
+	userID, err := identity.IntIdentifier(namespaceID, userIDstr)
+	if err != nil {
+		s.log.Warn("failed to parse user ID", "namespaceID", namespaceID, "userID", userIDstr, "error", err)
+	}
+
 	cmd := &dashboards.SaveDashboardCommand{
 		Dashboard: dash.Data,
 		Message:   dto.Message,
 		OrgID:     dto.OrgID,
 		Overwrite: dto.Overwrite,
-		UserID:    dto.User.UserID,
+		UserID:    userID,
 		FolderID:  dash.FolderID,
 		IsFolder:  dash.IsFolder,
 		PluginID:  dash.PluginID,
@@ -783,7 +803,7 @@ func (s *Service) BuildSaveDashboardCommand(ctx context.Context, dto *dashboards
 
 // getGuardianForSavePermissionCheck returns the guardian to be used for checking permission of dashboard
 // It replaces deleted Dashboard.GetDashboardIdForSavePermissionCheck()
-func getGuardianForSavePermissionCheck(ctx context.Context, d *dashboards.Dashboard, user *user.SignedInUser) (guardian.DashboardGuardian, error) {
+func getGuardianForSavePermissionCheck(ctx context.Context, d *dashboards.Dashboard, user identity.Requester) (guardian.DashboardGuardian, error) {
 	newDashboard := d.ID == 0
 
 	if newDashboard {