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.Common/Extensions/WebApplicationBuilderExtensions.cs

@@ -0,0 +1,36 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Hosting;
+using Umbraco.Cms.Core.Configuration.Models;
+using Umbraco.Cms.Core.DependencyInjection;
+
+namespace Umbraco.Extensions;
+
+/// <summary>
+/// Extension methods for <see cref="WebApplicationBuilder" />.
+/// </summary>
+public static class WebApplicationBuilderExtensions
+{
+    /// <summary>
+    /// Creates an <see cref="IUmbracoBuilder" /> and registers basic Umbraco services.
+    /// </summary>
+    /// <param name="builder">The builder.</param>
+    /// <returns>
+    /// The Umbraco builder.
+    /// </returns>
+    public static IUmbracoBuilder CreateUmbracoBuilder(this WebApplicationBuilder builder)
+    {
+        // Configure Umbraco defaults, but ignore decorated host builder and
+        // don't add runtime as hosted service (this is replaced by the explicit BootUmbracoAsync)
+        builder.Host.ConfigureUmbracoDefaults(false);
+
+        // Do not enable static web assets on production environments,
+        // because the files are already copied to the publish output folder.
+        if (builder.Configuration.GetRuntimeMode() != RuntimeMode.Production)
+        {
+            builder.WebHost.UseStaticWebAssets();
+        }
+
+        return builder.Services.AddUmbraco(builder.Environment, builder.Configuration);
+    }
+}