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

test/integration/confirmable_test.rb

@@ -136,6 +136,15 @@ class ConfirmationTest < Devise::IntegrationTest
     end
   end
 
+  test 'not confirmed user redirect respects i18n locale set' do
+    swap Devise, allow_unconfirmed_access_for: 0.days do
+      sign_in_as_user(confirm: false, visit: new_user_session_path(locale: "pt-BR"))
+
+      assert_contain 'Você precisa confirmar seu email para continuar'
+      assert_not warden.authenticated?(:user)
+    end
+  end
+
   test 'not confirmed user should not see confirmation message if invalid credentials are given' do
     swap Devise, allow_unconfirmed_access_for: 0.days do
       sign_in_as_user(confirm: false) do

test/integration/timeoutable_test.rb

@@ -167,6 +167,17 @@ class SessionTimeoutTest < Devise::IntegrationTest
     end
   end
 
+  test 'error message redirect respects i18n locale set' do
+    user = sign_in_as_user
+
+    get expire_user_path(user)
+    get root_path(locale: "pt-BR")
+    follow_redirect!
+
+    assert_contain 'Sua sessão expirou. Por favor faça o login novamente para continuar.'
+    assert_not warden.authenticated?(:user)
+  end
+
   test 'time out not triggered if remembered' do
     user = sign_in_as_user remember_me: true
     get expire_user_path(user)