Startup Async Configure

[jtkech]

@MikeAlhayek

Fixes #14784, related to #14798

You can try this pattern that I used to configure the RequestLocalizationMiddleware

[jtkech]

Added OCBuilder helpers to allow

builder.Services
    .AddOrchardCms()
    .AddSetupFeatures("OrchardCore.AutoSetup")
    .Configure(async (app, routes, sp) =>
     {
         await Task.Delay(1000);
     }, order: 10)
    .Configure(async (app, routes) =>
    {
        await Task.Delay(1000);
    }, order:10)
    .Configure(async (app) =>
    {
        await Task.Delay(1000);
    }, order:10);

[jtkech]

One last thing is that all async configure will run before non async configure.

Maybe better that for each startup (ordered by their Oder property) we call both its async and non async configure. But as said would need to override UseEndpoints() so that it accepts an async delegate.

[jtkech]

Okay I found a way to allow the async configure to also configure routes.

And now async configure and non async configure are called pair by pair for each startup, no longer all async configure before all non async configure.