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/requests/application_controller_spec.rb

@@ -268,7 +268,7 @@ RSpec.describe ApplicationController do
 
       expect(log).not_to include("exception app middleware")
 
-      expect(response.status).to eq(400)
+      expect(response.parsed_body).to eq("status" => 400, "error" => "Bad Request")
     end
   end