AccessControl: Cleanup access control interface (#49783)

* removed unused function

* Rename interface

pkg/services/accesscontrol/accesscontrol.go

@@ -23,9 +23,6 @@ type AccessControl interface {
 	// GetUserPermissions returns user permissions with only action and scope fields set.
 	GetUserPermissions(ctx context.Context, user *models.SignedInUser, options Options) ([]*Permission, error)
 
-	// GetUserRoles returns user roles.
-	GetUserRoles(ctx context.Context, user *models.SignedInUser) ([]*RoleDTO, error)
-
 	//IsDisabled returns if access control is enabled or not
 	IsDisabled() bool
 
@@ -38,7 +35,12 @@ type AccessControl interface {
 	RegisterScopeAttributeResolver(scopePrefix string, resolver ScopeAttributeResolver)
 }
 
-type PermissionsProvider interface {
+type RoleRegistry interface {
+	// RegisterFixedRoles registers all roles declared to AccessControl
+	RegisterFixedRoles(ctx context.Context) error
+}
+
+type PermissionsStore interface {
 	// GetUserPermissions returns user permissions with only action and scope fields set.
 	GetUserPermissions(ctx context.Context, query GetUserPermissionsQuery) ([]*Permission, error)
 }