DEV: Skip broken deprecated settings test until TL mapping is done (#25046)

These tests are still flaky (order dependence) just that now it doesn't fail the test, instead it creates an infinite loop. Skipping these for now. We know they work because they pass, but they leak into other tests. I think we can re-enable locally and either fix or remove this once TL migration is done.

spec/lib/site_settings/deprecated_settings_spec.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe SiteSettings::DeprecatedSettings do
+RSpec.xdescribe SiteSettings::DeprecatedSettings do
   def deprecate_override!(settings, tl_group_overrides = [])
     @original_settings = SiteSettings::DeprecatedSettings::SETTINGS.dup
     SiteSettings::DeprecatedSettings::SETTINGS.clear