Ensure LTO is enabled as a info.json build config option (#22932)

* feature.lto -> build.lto

* keymaps too

lib/python/qmk/info.py

@@ -233,6 +233,9 @@ def _extract_features(info_data, rules):
             key = '_'.join(key.split('_')[:-1]).lower()
             value = True if value.lower() in true_values else False if value.lower() in false_values else value
 
+            if key in ['lto']:
+                continue
+
             if 'config_h_features' not in info_data:
                 info_data['config_h_features'] = {}