DEV: Revert rails 7.1 upgrade (#27522)

* Revert "FIX: Set `override_level` on Logster loggers (#27519)"

This reverts commit c1b0488c547bca935de51cfbb86bbc528e9ab2e5.

* Revert "DEV: Make parameters optional to all FakeLogger methods"

This reverts commit 3318dad7b4e3365854319bb55301cf667a2c28d0.

* Revert "FIX: Remove references to `Rails.logger.chained`"

This reverts commit f595d599dd361b7fb39fb3c82cbc11d19d518c19.

* Revert "DEV: Upgrade Rails to 7.1"

This reverts commit 081b00391e47a7f9bc44b9fe8ce88ac97d728352.

spec/lib/site_setting_extension_spec.rb

@@ -422,7 +422,9 @@ RSpec.describe SiteSettingExtension do
       end
     end
 
-    let(:test_enum_class) { TestEnumClass }
+    let :test_enum_class do
+      TestEnumClass
+    end
 
     before do
       settings.setting(:test_enum, "en", enum: test_enum_class)