Pass locale with activatable / timeoutable hooks (#5815)

We need to explicitly pass the `locale` around from the options (passed
to `warden.authenticate!` for instance) or the `I18n.locale` when
logging out and redirecting the user via `throw :warden`, otherwise in a
multi-locale app we'd lose the locale previously set / passed around and
fallback to the default for that flash message.

This is a follow-up of the fixes in #5567 where we implemented the
locale passing logic down to the failure app, but it missed these places
where we were using `throw :warden`.

Closes #5812

lib/devise/hooks/activatable.rb

@@ -7,6 +7,6 @@ Warden::Manager.after_set_user do |record, warden, options|
   if record && record.respond_to?(:active_for_authentication?) && !record.active_for_authentication?
     scope = options[:scope]
     warden.logout(scope)
-    throw :warden, scope: scope, message: record.inactive_message
+    throw :warden, scope: scope, message: record.inactive_message, locale: options.fetch(:locale, I18n.locale)
   end
 end

lib/devise/hooks/timeoutable.rb

@@ -25,7 +25,7 @@ Warden::Manager.after_set_user do |record, warden, options|
         record.timedout?(last_request_at) &&
         !proxy.remember_me_is_active?(record)
       Devise.sign_out_all_scopes ? proxy.sign_out : proxy.sign_out(scope)
-      throw :warden, scope: scope, message: :timeout
+      throw :warden, scope: scope, message: :timeout, locale: options.fetch(:locale, I18n.locale)
     end
 
     unless env['devise.skip_trackable']