test: move MenuItem spec to main process (#19235)

* test: move MenuItem spec to main process

* spec: fix errant default accel test

* Update menu-item-roles.js

* Update api-menu-item-spec.ts

lib/browser/api/menu-item-roles.js

@@ -82,7 +82,7 @@ const roles = {
         default: return 'Quit'
       }
     },
-    accelerator: isWindows ? null : 'CommandOrControl+Q',
+    accelerator: isWindows ? undefined : 'CommandOrControl+Q',
     appMethod: 'quit'
   },
   redo: {
@@ -251,6 +251,8 @@ const roles = {
   }
 }
 
+exports.roleList = roles
+
 const canExecuteRole = (role) => {
   if (!roles.hasOwnProperty(role)) return false
   if (!isMac) return true