refactor: unify module-list format and exports/electron (#19697)

lib/common/define-properties.ts

@@ -0,0 +1,17 @@
+const handleESModule = (loader: ElectronInternal.ModuleLoader) => () => {
+  const value = loader()
+  if (value.__esModule && value.default) return value.default
+  return value
+}
+
+// Attaches properties to |targetExports|.
+export function defineProperties (targetExports: Object, moduleList: ElectronInternal.ModuleEntry[]) {
+  const descriptors: PropertyDescriptorMap = {}
+  for (const module of moduleList) {
+    descriptors[module.name] = {
+      enumerable: !module.private,
+      get: handleESModule(module.loader)
+    }
+  }
+  return Object.defineProperties(targetExports, descriptors)
+}