Implements Public Access in netcore (#10137)

* Getting new netcore PublicAccessChecker in place

* Adds full test coverage for PublicAccessChecker

* remove PublicAccessComposer

* adjust namespaces, ensure RoleManager works, separate public access controller, reduce content controller

* Implements the required methods on IMemberManager, removes old migrated code

* Updates routing to be able to re-route, Fixes middleware ordering ensuring endpoints are last, refactors pipeline options, adds public access middleware, ensures public access follows all hops

* adds note

* adds note

* Cleans up ext methods, ensures that members identity is added on both front-end and back ends. updates how UmbracoApplicationBuilder works in that it explicitly starts endpoints at the time of calling.

* Changes name to IUmbracoEndpointBuilder

* adds note

* Fixing tests, fixing error describers so there's 2x one for back office, one for members, fixes TryConvertTo, fixes login redirect

* fixing build

* Fixes keepalive, fixes PublicAccessMiddleware to not throw, updates startup code to be more clear and removes magic that registers middleware.

* adds note

* removes unused filter, fixes build

* fixes WebPath and tests

* Looks up entities in one query

* remove usings

* Fix test, remove stylesheet

* Set status code before we write to response to avoid error

* Ensures that users and members are validated when logging in. Shares more code between users and members.

* Fixes RepositoryCacheKeys to ensure the keys are normalized

* oops didn't mean to commit this

* Fix casing issues with caching, stop boxing value types for all cache operations, stop re-creating string keys in DefaultRepositoryCachePolicy

* bah, far out this keeps getting recommitted. sorry

Co-authored-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Core/Security/IIdentityUserToken.cs

@@ -0,0 +1,30 @@
+using Umbraco.Cms.Core.Models.Entities;
+
+namespace Umbraco.Cms.Core.Security
+{
+    /// <summary>
+    /// An external login provider token
+    /// </summary>
+    public interface IIdentityUserToken : IEntity
+    {
+        /// <summary>
+        /// Gets or sets user Id for the user who owns this token
+        /// </summary>
+        string UserId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the login provider for the login (i.e. Facebook, Google)
+        /// </summary>
+        string LoginProvider { get; set; }
+
+        /// <summary>
+        /// Gets or sets the token name
+        /// </summary>
+        string Name { get; set; }
+
+        /// <summary>
+        /// Gets or set the token value
+        /// </summary>
+        string Value { get; set; }
+    }
+}