AuthN: Fix namespaces for anonymous and render (#75661)

* AuthN: remove IsAnonymous from identity struct and set correct namespace for anonymous and render

* Don't parse user id for render namespace

pkg/services/anonymous/anonimpl/client.go

@@ -57,7 +57,7 @@ func (a *Anonymous) Authenticate(ctx context.Context, r *authn.Request) (*authn.
 	}()
 
 	return &authn.Identity{
-		IsAnonymous:  true,
+		ID:           authn.AnonymousNamespaceID,
 		OrgID:        o.ID,
 		OrgName:      o.Name,
 		OrgRoles:     map[int64]org.RoleType{o.ID: org.RoleType(a.cfg.AnonymousOrgRole)},

pkg/services/anonymous/anonimpl/client_test.go

@@ -59,7 +59,7 @@ func TestAnonymous_Authenticate(t *testing.T) {
 			} else {
 				require.Nil(t, err)
 
-				assert.Equal(t, true, identity.ID == "")
+				assert.Equal(t, authn.AnonymousNamespaceID, identity.ID)
 				assert.Equal(t, tt.org.ID, identity.OrgID)
 				assert.Equal(t, tt.org.Name, identity.OrgName)
 				assert.Equal(t, tt.cfg.AnonymousOrgRole, string(identity.GetOrgRole()))