DEV: Upgrade Rails to version 7.1 (#27539)

* DEV: Upgrade Rails to 7.1

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

`Rails.logger.chained` was provided by Logster before Rails 7.1
introduced their broadcast logger. Now all the loggers are added to
`Rails.logger.broadcasts`.

Some code in our initializers was still using `chained` instead of
`broadcasts`.

* DEV: Make parameters optional to all FakeLogger methods

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

A followup to f595d599dd

* FIX: Don’t duplicate Rack response

---------

Co-authored-by: Jarek Radosz <jradosz@gmail.com>

spec/requests/embed_controller_spec.rb

@@ -190,8 +190,6 @@ RSpec.describe EmbedController do
     context "with a host" do
       fab!(:embeddable_host)
 
-      before { Jobs.run_immediately! }
-
       it "doesn't raise an error with no referer" do
         get "/embed/comments", params: { embed_url: embed_url }
 
@@ -246,6 +244,8 @@ RSpec.describe EmbedController do
       end
 
       context "with success" do
+        before { Jobs.run_immediately! }
+
         it "tells the topic retriever to work when no previous embed is found" do
           TopicRetriever.any_instance.expects(:retrieve)