Initialize fastgettext defaults earlier

1_settings.rb may trigger validations that use translations. We
must initialize these earlier so that these don't throw an
exception while booting

config/initializers/9_fast_gettext.rb

-FastGettext.add_text_domain 'gitlab',
-                            path: File.join(Rails.root, 'locale'),
-                            type: :po,
-                            ignore_fuzzy: true
-FastGettext.default_text_domain = 'gitlab'
 FastGettext.default_available_locales = Gitlab::I18n.available_locales
-FastGettext.default_locale = :en
-
 I18n.available_locales = Gitlab::I18n.available_locales

config/initializers_before_autoloader/001_fast_gettext.rb

+# frozen_string_literal: true
+
+FastGettext.add_text_domain 'gitlab',
+                            path: File.join(Rails.root, 'locale'),
+                            type: :po,
+                            ignore_fuzzy: true
+FastGettext.default_text_domain = 'gitlab'
+FastGettext.default_locale = :en