Fixes oatpp generator to expose network server on 0.0.0.0 instead of localhost (OpenAPITools#22330)

* Change server address from 'localhost' to '0.0.0.0'

* Change server connection to listen on all interfaces

Author: julian-st

modules/openapi-generator/src/main/resources/cpp-oatpp-server/main-api-server.mustache

@@ -22,7 +22,7 @@ public:
    *  Create ConnectionProvider component which listens on the port
    */
   OATPP_CREATE_COMPONENT(std::shared_ptr<oatpp::network::ServerConnectionProvider>, serverConnectionProvider)([] {
-    return oatpp::network::tcp::server::ConnectionProvider::createShared({"localhost", {{serverPort}}{{^serverPort}}8080{{/serverPort}}, oatpp::network::Address::IP_4});
+    return oatpp::network::tcp::server::ConnectionProvider::createShared({"0.0.0.0", {{serverPort}}{{^serverPort}}8080{{/serverPort}}, oatpp::network::Address::IP_4});
   }());
 
   /**

samples/server/petstore/cpp-oatpp/main-api-server.cpp

@@ -34,7 +34,7 @@ class AppComponent {
    *  Create ConnectionProvider component which listens on the port
    */
   OATPP_CREATE_COMPONENT(std::shared_ptr<oatpp::network::ServerConnectionProvider>, serverConnectionProvider)([] {
-    return oatpp::network::tcp::server::ConnectionProvider::createShared({"localhost", 8080, oatpp::network::Address::IP_4});
+    return oatpp::network::tcp::server::ConnectionProvider::createShared({"0.0.0.0", 8080, oatpp::network::Address::IP_4});
   }());
 
   /**