Add new export_diagnostics feature flag

lib/feature-flags.js

@@ -36,6 +36,7 @@ var Feature;
 (function (Feature) {
     Feature["CliConfigFileEnabled"] = "cli_config_file_enabled";
     Feature["DisableKotlinAnalysisEnabled"] = "disable_kotlin_analysis_enabled";
+    Feature["ExportDiagnosticsEnabled"] = "export_diagnostics_enabled";
     Feature["MlPoweredQueriesEnabled"] = "ml_powered_queries_enabled";
     Feature["UploadFailedSarifEnabled"] = "upload_failed_sarif_enabled";
 })(Feature = exports.Feature || (exports.Feature = {}));
@@ -56,6 +57,10 @@ exports.featureConfig = {
         envVar: "CODEQL_ACTION_UPLOAD_FAILED_SARIF",
         minimumVersion: "2.11.3",
     },
+    [Feature.ExportDiagnosticsEnabled]: {
+        envVar: "CODEQL_ACTION_EXPORT_DIAGNOSTICS",
+        minimumVersion: "2.12.4",
+    },
 };
 exports.FEATURE_FLAGS_FILE_NAME = "cached-feature-flags.json";
 /**