Experiment: C++17 support (#9874)

* Add C++17 support

* Add C++17 runtime probes and update build configurations for STM32 and Portduino

* Remove unflags

* Update C++ standard flags across the platforms

* Convert a couple of instances to structured bindings

* NRF52 platform.txt to add C++17 support

* Still need the unflags apparently

* Remove C++17 runtime probe tests from test_main.cpp

* Reconfigured doesnt need a nodiscard

* Remove nodiscard attribute from init() method in RadioInterface

* Remove mbedtls/error.h from build flags

Removed include directive for mbedtls/error.h from build flags.

* Fix IRAM overflow

* Fix IRAM overflow

* Add build flag to exclude MQTT from rak11200

* Update C++ standard from gnu17 to gnu++17

src/mqtt/MQTT.cpp

@@ -300,7 +300,9 @@ struct PubSubConfig {
         if (config.tls_enabled) {
             serverPort = 8883;
         }
-        std::tie(serverAddr, serverPort) = parseHostAndPort(serverAddr.c_str(), serverPort);
+        auto [parsedServerAddr, parsedServerPort] = parseHostAndPort(serverAddr.c_str(), serverPort);
+        serverAddr = std::move(parsedServerAddr);
+        serverPort = parsedServerPort;
     }
 
     // Defaults
@@ -441,7 +443,8 @@ MQTT::MQTT() : concurrency::OSThread("mqtt"), mqttQueue(MAX_MQTT_QUEUE)
                 moduleConfig.mqtt.map_report_settings.publish_interval_secs, default_map_publish_interval_secs);
         }
 
-        String host = parseHostAndPort(moduleConfig.mqtt.address).first;
+        auto [host, parsedPort] = parseHostAndPort(moduleConfig.mqtt.address);
+        (void)parsedPort;
         isConfiguredForDefaultServer = isDefaultServer(host);
         IPAddress ip;
         isMqttServerAddressPrivate = ip.fromString(host.c_str()) && isPrivateIpAddress(ip);