Upgrade to latest redis-rb 4.x and fix deprecations (#23616)

Co-authored-by: Jean Boussier <jean.boussier@gmail.com>

config/environments/development.rb

@@ -87,6 +87,8 @@ Rails.application.configure do
   config.x.otp_secret = ENV.fetch('OTP_SECRET', '1fc2b87989afa6351912abeebe31ffc5c476ead9bf8b3d74cbc4a302c7b69a45b40b1bbef3506ddad73e942e15ed5ca4b402bf9a66423626051104f4b5f05109')
 end
 
+Redis.raise_deprecations = true
+
 ActiveRecordQueryTrace.enabled = ENV['QUERY_TRACE_ENABLED'] == 'true'
 
 module PrivateAddressCheck

config/environments/test.rb

@@ -73,3 +73,5 @@ end
 
 # Catch serialization warnings early
 Sidekiq.strict_args!
+
+Redis.raise_deprecations = true

config/initializers/redis.rb

@@ -0,0 +1 @@
+Redis.sadd_returns_boolean = false