Fix cppcheck HIGH error (#5250)

https://github.com/meshtastic/firmware/pull/5247 introduced new
protobufs, particularly the excluded_modules feature.

Immediately afterward, cppcheck started sounding klaxons about
an unitialized variable. This patch simply sets excluded_modules
to none as a temporary measure while the feature from protobuf
is integrated into code.

src/main.cpp

@@ -1160,6 +1160,7 @@ extern meshtastic_DeviceMetadata getDeviceMetadata()
     deviceMetadata.position_flags = config.position.position_flags;
     deviceMetadata.hw_model = HW_VENDOR;
     deviceMetadata.hasRemoteHardware = moduleConfig.remote_hardware.enabled;
+    deviceMetadata.excluded_modules = meshtastic_ExcludedModules_EXCLUDED_NONE;
 #if !(MESHTASTIC_EXCLUDE_PKI)
     deviceMetadata.hasPKC = true;
 #endif
@@ -1195,4 +1196,4 @@ void loop()
         mainDelay.delay(delayMsec);
     }
 }
-#endif
+#endif