totalTimeSpentRendering and totalTimeSpentServicingRequests fail

[javier-godoy]

Neither totalTimeSpentRendering nor totalTimeSpentServicingRequests considers Flow.clients.TypeScript (see vaadin/flow#7514).

In consequence, totalTimeSpentRendering fails with:

org.openqa.selenium.JavascriptException: javascript error: Performance data is not available in production mode 

and totalTimeSpentServicingRequests fails with:

window.Vaadin.Flow.clients[client].poll is not a function

Vaadin 24.2.5

[mshabarov]

Apparently getProfilingData() and poll() functions aren't implemented for TypeScript client.
Until these two are implemented in (Hilla ?), we might need to check if poll() function is defined before calling it, and check if the client is of type "TypeScript" before checking it. This at least would fix the API for Hilla applications.