Move to Minimal Hosting Model in a backwards compatible way (#14656)

* Use minimal hosting model

* Make CoreRuntime backward compatible to the old hosting model

* Remove unneccessary methods from interface again

* Pushed the timeout for E2E test to 120 minutes instead of 60

* Updated the preview version from 6 to 7

* Explicitly call BootUmbracoAsync

* Add CreateUmbracoBuilder extension method

* Do not add IRuntime as hosted service when using WebApplication/WebApplicationBuilder

* Set StaticServiceProvider.Instance before booting

* Ensure Umbraco is booted and StaticServiceProvider.Instance is set before configuring middleware

* Do not enable static web assets on production environments

* Removed root namespace from viewImports

---------

Co-authored-by: Andreas Zerbst <andr317c@live.dk>
Co-authored-by: Ronald Barendse <ronald@barend.se>

src/Umbraco.Web.UI/Program.cs

@@ -1,19 +1,36 @@
-namespace Umbraco.Cms.Web.UI
-{
-    public class Program
-    {
-        public static void Main(string[] args)
-            => CreateHostBuilder(args)
-                .Build()
-                .Run();
+WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
 
-        public static IHostBuilder CreateHostBuilder(string[] args) =>
-            Host.CreateDefaultBuilder(args)
-                .ConfigureUmbracoDefaults()
-                .ConfigureWebHostDefaults(webBuilder =>
-                {
-                    webBuilder.UseStaticWebAssets();
-                    webBuilder.UseStartup<Startup>();
-                });
-    }
+builder.CreateUmbracoBuilder()
+    .AddBackOffice()
+    .AddWebsite()
+    .AddDeliveryApi()
+    .AddComposers()
+    .Build();
+
+WebApplication app = builder.Build();
+
+await app.BootUmbracoAsync();
+
+if (app.Environment.IsDevelopment())
+{
+    app.UseDeveloperExceptionPage();
 }
+
+#if (UseHttpsRedirect)
+app.UseHttpsRedirection();
+#endif
+
+app.UseUmbraco()
+    .WithMiddleware(u =>
+    {
+        u.UseBackOffice();
+        u.UseWebsite();
+    })
+    .WithEndpoints(u =>
+    {
+        u.UseInstallerEndpoints();
+        u.UseBackOfficeEndpoints();
+        u.UseWebsiteEndpoints();
+    });
+
+await app.RunAsync();