test: refactor net-connect-handle-econnrefused

- Remove unneeded server
- Use `common.PORT`

PR-URL: #27014
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

test/sequential/test-net-connect-handle-econnrefused.js

@@ -24,13 +24,8 @@ const common = require('../common');
 const net = require('net');
 const assert = require('assert');
 
-const server = net.createServer();
-server.listen(0);
-const port = server.address().port;
-server.close(common.mustCall(() => {
-  const c = net.createConnection(port);
-  c.on('connect', common.mustNotCall());
-  c.on('error', common.mustCall((e) => {
-    assert.strictEqual(e.code, 'ECONNREFUSED');
-  }));
+const c = net.createConnection(common.PORT);
+c.on('connect', common.mustNotCall());
+c.on('error', common.mustCall((e) => {
+  assert.strictEqual(e.code, 'ECONNREFUSED');
 }));