Bulk delete functionality for management api (#14735)

* Bulk delete

* Bulk delete

* Added bulk delete user groups

* Clean

---------

Co-authored-by: Nikolaj <nikolajlauridsen@protonmail.ch>

src/Umbraco.Cms.Api.Management/ViewModels/User/DeleteUsersRequestModel.cs

@@ -0,0 +1,6 @@
+namespace Umbraco.Cms.Api.Management.ViewModels.User;
+
+public class DeleteUsersRequestModel
+{
+    public HashSet<Guid> UserIds { get; set; } = new();
+}

src/Umbraco.Cms.Api.Management/ViewModels/User/DisableUserRequestModel.cs

@@ -3,4 +3,4 @@
 public class DisableUserRequestModel
 {
     public HashSet<Guid> UserIds { get; set; } = new();
- }
+}