test: https agent clientcertengine coverage

PR-URL: #24248
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/test-https-agent-getname.js

@@ -22,6 +22,7 @@ const options = {
   localAddress: '192.168.1.1',
   ca: 'ca',
   cert: 'cert',
+  clientCertEngine: 'dynamic',
   ciphers: 'ciphers',
   crl: [Buffer.from('c'), Buffer.from('r'), Buffer.from('l')],
   dhparam: 'dhparam',
@@ -38,6 +39,6 @@ const options = {
 
 assert.strictEqual(
   agent.getName(options),
-  '0.0.0.0:443:192.168.1.1:ca:cert::ciphers:key:pfx:false:localhost:' +
+  '0.0.0.0:443:192.168.1.1:ca:cert:dynamic:ciphers:key:pfx:false:localhost:' +
     'secureProtocol:c,r,l:false:ecdhCurve:dhparam:0:sessionIdContext'
 );