Fix password reset for non-test env

Fixes `Plug.Conn.NotSentError` that causes a 5xx error in response
instead of 404 and 400.

Fixes pattern matching error caused by different response format
in test and non-test env: `Pleroma.Emails.Mailer.deliver_async` returns
:ok when PleromaJobQueue is enabled and `{:ok, _}` when it's disabled.
In tests, it's disabled.

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -221,6 +221,8 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
       user
       |> UserEmail.password_reset_email(token_record.token)
       |> Mailer.deliver_async()
+
+      {:ok, :enqueued}
     else
       false ->
         {:error, "bad user identifier"}