Improve stack traces in benchmarks (#52828)

Summary:
Pull Request resolved: #52828

Changelog: [internal]

Just a small quality of life improvement. It forces the test functions in benchmarks to have the name of the test case if it's an anonymous function, so it shows better in stack traces.

Reviewed By: sammy-SC

Differential Revision: D78924769

fbshipit-source-id: 9b44a49feaae93ccfa90cc726274f0ea013654b1

Author: rubennorte

private/react-native-fantom/src/Benchmark.js

@@ -115,6 +115,11 @@ export function suite(
         continue;
       }
 
+      if (task.fn.name === '') {
+        // $FlowExpectedError[cannot-write]
+        Object.defineProperty(task.fn, 'name', {value: task.name});
+      }
+
       const {only, ...options} = task.options ?? {};
       bench.add(task.name, task.fn, options);
     }