[Blazor] Dynamically adjust WebAssembly resource download throttling

There might be cases where a component with an `InteractiveAuto` render mode gets rendered, which initiates the throttled download of WebAssembly assets, but then an `InteractiveWebAssembly` component later gets added to the page. It might be desirable in such a case to dynamically disable throttling _after_ the WebAssembly resource download has started so that the `InteractiveWebAssembly` component becomes interactive as quickly as possible.