Fix REST registration endpoint (#8738)

* Re-add html account base
Fixes #8690

* fix base template

* override dj-rest-auth pattern to fix fixed token model reference

* pin req

* fix urls.py

* move definition out to separate file

* fix possible issues where email is not enabled but UI shows that registration is enabled

* fix import order

* fix token recovery

* make sure registration redirects

* fix name change

* fix import name

* adjust description

* cleanup

* bum api version

* add test for registration

* add test for registration requirements

src/frontend/src/components/forms/AuthenticationForm.tsx

@@ -198,7 +198,7 @@ export function RegistrationForm() {
         headers: { Authorization: '' }
       })
       .then((ret) => {
-        if (ret?.status === 204) {
+        if (ret?.status === 204 || ret?.status === 201) {
           setIsRegistering(false);
           showLoginNotification({
             title: t`Registration successful`,