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 f595d599dd361b7fb39fb3c82cbc11d19d518c19

* FIX: Don’t duplicate Rack response

---------

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

spec/lib/migration/safe_migrate_spec.rb

@@ -9,11 +9,12 @@ RSpec.describe Migration::SafeMigrate do
   end
 
   def migrate_up(path)
-    migrations = ActiveRecord::MigrationContext.new(path, ActiveRecord::SchemaMigration).migrations
+    migrations = ActiveRecord::MigrationContext.new(path).migrations
     ActiveRecord::Migrator.new(
       :up,
       migrations,
-      ActiveRecord::SchemaMigration,
+      ActiveRecord::Base.connection.schema_migration,
+      ActiveRecord::Base.connection.internal_metadata,
       migrations.first.version,
     ).run
   end
@@ -77,7 +78,7 @@ RSpec.describe Migration::SafeMigrate do
 
     output = capture_stdout { migrate_up(path) }
 
-    expect(output).to include("change_column_null(:users, :username, true)")
+    expect(output).to include("change_column_null(:users, :username, true, nil)")
   end
 
   it "supports being disabled" do