NetCore: MSDI refactor split CoreRuntime & Remove Current (#9356)

* Split Bootstrap code from CoreRuntime

* Make ContentService method signatures match interface
prevents need to hide the concrete class in tests

* Remove Current

Only bit that bugs me is TreeNode for IconFilePath
I get the feeling it's dead code, but can just use a setter in cs or work out path in js if required.

* Fix tests, remember to terminate IRuntime

src/Umbraco.Infrastructure/Services/Implement/ContentService.cs

@@ -1767,7 +1767,7 @@ namespace Umbraco.Core.Services.Implement
         #region Delete
 
         /// <inheritdoc />
-        public OperationResult Delete(IContent content, int userId)
+        public OperationResult Delete(IContent content, int userId = Constants.Security.SuperUserId)
         {
             var evtMsgs = EventMessagesFactory.Get();
 
@@ -1897,7 +1897,7 @@ namespace Umbraco.Core.Services.Implement
         #region Move, RecycleBin
 
         /// <inheritdoc />
-        public OperationResult MoveToRecycleBin(IContent content, int userId)
+        public OperationResult MoveToRecycleBin(IContent content, int userId = Constants.Security.SuperUserId)
         {
             var evtMsgs = EventMessagesFactory.Get();
             var moves = new List<(IContent, string)>();