test: move require of http2 to after crypto check

Currently when configured without-ssl test-heapdump-http2.js will fail
with a missing crypto message.
This commit moves the require of http2 to after the crypto check.

PR-URL: #22148
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

Author: danbev

test/parallel/test-heapdump-http2.js

@@ -2,9 +2,9 @@
 'use strict';
 const common = require('../common');
 const { recordState } = require('../common/heap');
-const http2 = require('http2');
 if (!common.hasCrypto)
   common.skip('missing crypto');
+const http2 = require('http2');
 
 {
   const state = recordState();