Access Control: Store permissions on SignedInUser (#43040)

* add permission structure to signedinuser

* add middleware to load user permissions into signedinuser struct

* apply LoadPermissionsMiddleware to http server

* check for permissions in signedinuser struct

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>

pkg/services/accesscontrol/accesscontrol.go

@@ -97,14 +97,10 @@ func BuildPermissionsMap(permissions []*Permission) map[string]bool {
 }
 
 // GroupScopesByAction will group scopes on action
-func GroupScopesByAction(permissions []*Permission) map[string]map[string]struct{} {
-	m := make(map[string]map[string]struct{})
+func GroupScopesByAction(permissions []*Permission) map[string][]string {
+	m := make(map[string][]string)
 	for _, p := range permissions {
-		if _, ok := m[p.Action]; ok {
-			m[p.Action][p.Scope] = struct{}{}
-		} else {
-			m[p.Action] = map[string]struct{}{p.Scope: {}}
-		}
+		m[p.Action] = append(m[p.Action], p.Scope)
 	}
 	return m
 }