Variables: added __user.email to global variable (#28853)

* added email to global variable.

* forgot to increase the count.

public/app/core/services/context_srv.ts

@@ -16,6 +16,7 @@ export class User {
   helpFlags1: number;
   lightTheme: boolean;
   hasEditPermissionInFolders: boolean;
+  email?: string;
 
   constructor() {
     if (config.bootData.user) {

public/app/features/variables/state/actions.ts

@@ -161,6 +161,7 @@ export const addSystemTemplateVariables = (dashboard: DashboardModel): ThunkResu
         value: {
           login: contextSrv.user.login,
           id: contextSrv.user.id,
+          email: contextSrv.user.email,
           toString: () => contextSrv.user.id.toString(),
         },
       },

public/app/features/variables/types.ts

@@ -110,6 +110,7 @@ export interface OrgVariableModel extends SystemVariable<OrgProps> {}
 export interface UserProps {
   login: string;
   id: number;
+  email?: string;
   toString: () => string;
 }