test: deflake test-tls-socket-close

Move the check for the destroyed state of the remote socket to the inner
`setImmediate()`.

Refs: nodejs#49327 (comment)

Author: lpinca

test/parallel/test-tls-socket-close.js

@@ -44,9 +44,9 @@ function connectClient(server) {
 
       setImmediate(() => {
         assert.strictEqual(netSocket.destroyed, true);
-        assert.strictEqual(clientTlsSocket.destroyed, true);
 
         setImmediate(() => {
+          assert.strictEqual(clientTlsSocket.destroyed, true);
           assert.strictEqual(serverTlsSocket.destroyed, true);
 
           tlsServer.close();