AB#9725 - Removed IUmbracoApplicationLifetimeManager.cs and IUmbracoApplicationLifetime.ApplicationInit

Migrated some of the components to UmbracoBuilder and fixed issues with the way asp.net core need to append the profiler html

src/Umbraco.Web.Common/Profiler/InitializeWebProfiling.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Logging;
+using Umbraco.Core.Events;
+using Umbraco.Core.Logging;
+using Umbraco.Web.Common.Lifetime;
+
+namespace Umbraco.Web.Common.Profiler
+{
+    public class InitializeWebProfiling : INotificationHandler<UmbracoApplicationStarting>
+    {
+        private readonly bool _profile;
+        private readonly WebProfiler _profiler;
+        private readonly IUmbracoRequestLifetime _umbracoRequestLifetime;
+        private readonly List<Action> _terminate = new List<Action>();
+        public InitializeWebProfiling(IProfiler profiler, IUmbracoRequestLifetime umbracoRequestLifetime, ILogger<InitializeWebProfiling> logger)
+        {
+            _umbracoRequestLifetime = umbracoRequestLifetime;
+            _profile = true;
+
+            // although registered in WebRuntime.Compose, ensure that we have not
+            // been replaced by another component, and we are still "the" profiler
+            _profiler = profiler as WebProfiler;
+            if (_profiler != null) return;
+
+            // if VoidProfiler was registered, let it be known
+            if (profiler is NoopProfiler)
+                logger.LogInformation(
+                    "Profiler is VoidProfiler, not profiling (must run debug mode to profile).");
+            _profile = false;
+        }
+
+        /// <inheritdoc/>
+        public Task HandleAsync(UmbracoApplicationStarting notification, CancellationToken cancellationToken)
+        {
+            if (_profile)
+            {
+                void requestStart(object sender, HttpContext context) => _profiler.UmbracoApplicationBeginRequest(context);
+                _umbracoRequestLifetime.RequestStart += requestStart;
+                _terminate.Add(() => _umbracoRequestLifetime.RequestStart -= requestStart);
+
+                void requestEnd(object sender, HttpContext context) => _profiler.UmbracoApplicationEndRequest(context);
+                _umbracoRequestLifetime.RequestEnd += requestEnd;
+                _terminate.Add(() => _umbracoRequestLifetime.RequestEnd -= requestEnd);
+
+                // Stop the profiling of the booting process
+                _profiler.StopBoot();
+            }
+
+            return Task.CompletedTask;
+        }
+    }
+}