qt test: Don't bind to regtest port

The qt tests don't need to bind to the regtest port. By not binding, it
will no longer conflict with existing regtest instances and the tests
will run as normal.

src/qt/test/test_main.cpp

@@ -54,6 +54,13 @@ int main(int argc, char* argv[])
 
     NodeContext node_context;
     std::unique_ptr<interfaces::Node> node = interfaces::MakeNode(&node_context);
+    gArgs.ForceSetArg("-listen", "0");
+    gArgs.ForceSetArg("-listenonion", "0");
+    gArgs.ForceSetArg("-discover", "0");
+    gArgs.ForceSetArg("-dnsseed", "0");
+    gArgs.ForceSetArg("-fixedseeds", "0");
+    gArgs.ForceSetArg("-upnp", "0");
+    gArgs.ForceSetArg("-natpmp", "0");
 
     bool fInvalid = false;