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/support/fake_logger.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class FakeLogger
-  attr_reader :debugs, :infos, :warnings, :errors, :fatals
+  attr_reader :debugs, :infos, :warnings, :errors, :fatals, :severities
   attr_accessor :level
 
   def initialize
@@ -11,9 +11,10 @@ class FakeLogger
     @errors = []
     @fatals = []
     @level = Logger::DEBUG
+    @severities = { 0 => :debugs, 1 => :infos, 2 => :warnings, 3 => :errors, 4 => :fatals }
   end
 
-  def debug(message)
+  def debug(message = nil)
     @debugs << message
   end
 
@@ -29,7 +30,7 @@ class FakeLogger
     @level <= Logger::INFO
   end
 
-  def warn(message)
+  def warn(message = nil)
     @warnings << message
   end
 
@@ -37,7 +38,7 @@ class FakeLogger
     @level <= Logger::WARN
   end
 
-  def error(message)
+  def error(message = nil)
     @errors << message
   end
 
@@ -45,7 +46,7 @@ class FakeLogger
     @level <= Logger::ERROR
   end
 
-  def fatal(message)
+  def fatal(message = nil)
     @fatals << message
   end
 
@@ -55,4 +56,12 @@ class FakeLogger
 
   def formatter
   end
+
+  def add(severity, message = nil, progname = nil)
+    public_send(severities[severity]) << message
+  end
+
+  def broadcasts
+    [self]
+  end
 end

spec/support/i18n_helpers.rb

@@ -2,9 +2,12 @@
 
 module I18nHelpers
   def allow_missing_translations
+    original_handler = I18n.exception_handler
+    I18n.exception_handler = nil
     Rails.application.config.i18n.raise_on_missing_translations = false
     yield
   ensure
+    I18n.exception_handler = original_handler
     Rails.application.config.i18n.raise_on_missing_translations = true
   end
 end

spec/support/locales/dashboard.en.yml

@@ -0,0 +1,6 @@
+en:
+  new_key: new_key
+  dashboard:
+    problem:
+      foo: foo
+      bar: bar

spec/support/locales/message_builder.en.yml

@@ -0,0 +1,2 @@
+en:
+  modified_visit_link_to_respond: modified_visit_link_to_respond

spec/support/locales/problem_check.en.yml

@@ -0,0 +1,2 @@
+en:
+  failing_check: failing_check