Revert "lazy" evaluation

The spec states that `import.meta` properites must be JavaScript
values, not getters.
See https://tc39.es/ecma262/#sec-hostgetimportmetaproperties

lib/internal/modules/esm/initialize_import_meta.js

@@ -67,20 +67,10 @@ function resolveModuleMeta(url) {
     return { __dirname: undefined, __filename: undefined };
   }
 
-  // We return an object with getters to reduce memory usage in modules that
-  // do not use these properties, i.e. most modules don't need the values
-  // to be resolved until the first time the property is accessed.
-  let filePath;
-  let dirPath;
+  const filePath = fileURLToPath(url);
   return {
-    get __dirname() {
-      return dirname(filePath ??= fileURLToPath(url));
-    },
-    get __filename() {
-      filePath ??= fileURLToPath(url);
-      dirPath ??= dirname(filePath);
-      return filePath;
-    },
+    __dirname: dirname(filePath),
+    __filename: filePath,
   };
 }