require the use of node prefix on native imports

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/proxy-backend/src/service/router.test.ts

@@ -16,7 +16,7 @@
 
 import { mockServices } from '@backstage/backend-test-utils';
 import { Request, Response } from 'express';
-import * as http from 'http';
+import * as http from 'node:http';
 import {
   createProxyMiddleware,
   fixRequestBody,

plugins/proxy-backend/src/service/router.ts

@@ -21,7 +21,7 @@ import {
   fixRequestBody,
   RequestHandler,
 } from 'http-proxy-middleware';
-import http from 'http';
+import http from 'node:http';
 import { JsonObject } from '@backstage/types';
 import {
   DiscoveryService,