Netcore: Fixes issues with user invites (#9616)

* AB9629
Fixes issues with user invites
- Issue with the generated link in the invite email
- Allow anonymous access to CurrentUserController.PostSetInvitedUserPassword, as it is used by users not logged in
- Allow anonymous access to AuthenticationController.GetPasswordConfig, as this is used to set a password for newly invited users, before they login

* Fix issues with invite flow

* Fix minor typos

* Fixed issue with validation response and remove/change avatar

* Fix issue with disable users, after all enums are handled like strings

* Fix tests

* Fix other validation issue

* Fix yet another validation issue

Co-authored-by: Elitsa Marinovska <elm@umbraco.dk>

src/Umbraco.Web.UI.NetCore/appsettings.Development.json

@@ -20,9 +20,9 @@
         "CMS": {
             "Global": {
                 "Smtp": {
-                    //                    "From": "your@email.here",
-                    //                    "Host": "localhost",
-                    //                    "Port": "25"
+//                                        "From": "your@email.here",
+//                                        "Host": "localhost",
+//                                        "Port": "25"
                 }
             },
             "Hosting": {