test: simplify test skipping

* Make common.skip() exit.

  Also add common.printSkipMessage() for partial skips.

* Don't make needless things before skip

PR-URL: https://github.com/nodejs/node/pull/14021
Fixes: https://github.com/nodejs/node/issues/14016
Reviewed-By: Refael Ackermann <refack@gmail.com>

test/parallel/test-https-req-split.js

@@ -21,13 +21,12 @@
 
 'use strict';
 const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
 // disable strict server certificate validation by the client
 process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
 
-if (!common.hasCrypto) {
-  common.skip('missing crypto');
-  return;
-}
 const https = require('https');
 
 const tls = require('tls');