Merge branch '8.1' into 8.2

* 8.1:
  [HttpClient] Stop asserting the contents of IpUtils::PRIVATE_SUBNETS
  Run high-deps tests against doctrine/persistence 4
  [Notifier] [GoogleChat] Drop assertions that cannot run
  [Messenger] Hold the signals until the SQS request is actually sent
  [HttpClient] Skip the timing-sensitive timeout tests on Windows
  [HttpFoundation] Fix port stripping on IPv4-mapped IPv6 forwarded addresses
  [Serializer] Make MetadataAwareNameConverter caches per instance
  [HttpClient] Add missing non-routable ranges to NoPrivateNetworkHttpClient
  Remove dev dependency on doctrine/persistence
  [TwigBridge] Cap to twig <3.29

# Conflicts:
#	src/Symfony/Component/Messenger/Bridge/AmazonSqs/Tests/Transport/ConnectionTest.php
#	src/Symfony/Component/Messenger/Bridge/AmazonSqs/Transport/Connection.php
#	src/Symfony/Component/Serializer/NameConverter/MetadataAwareNameConverter.php
#	src/Symfony/Component/Serializer/Tests/NameConverter/MetadataAwareNameConverterTest.php