[wasm-mt] Log exit codes in browser samples to prevent tests from timeouting (#74637)

* Update browser-thread sample

* Update the browser-eventpipe sample

* Fix wasm_exit

* Revert eventpipe sample changes that didn't resolve the problem

* Use new JS api

* Try to use the new API also for the eventpipe sample

* Revert "Try to use the new API also for the eventpipe sample"

This reverts commit 9a10dc4abefcb7a27314be8349b3b93fcc00c3f7.

src/mono/sample/wasm/browser-threads/main.js

@@ -54,6 +54,8 @@ try {
     const inputElement = document.getElementById("inputN");
     const { setModuleImports, getAssemblyExports, runMain } = await dotnet
         .withEnvironmentVariable("MONO_LOG_LEVEL", "debug")
+        .withElementOnExit()
+        .withExitCodeLogging()
         .create();
 
     setModuleImports("main.js", {