Merge branch '6.0' into 6.1

* 6.0:
  Exclude from baseline generation deprecations triggered in legacy test
  [HttpFoundation] Update "[Session] Overwrite invalid session id" to only validate when files session storage is used
  [DoctrineBridge] Add missing break
  [PropertyInfo] CS fix
  [Serializer] Try all possible denormalization route with union types when ALLOW_EXTRA_ATTRIBUTES=false
  CS fix
  [Cache] Respect $save option in ChainAdapter
  [ExpressionLanguage] fix tests (bis)
  [ExpressionLanguage] fix tests
  Allow passing null in twig_is_selected_choice
  [Cache] Respect $save option in ArrayAdapter
  [HttpKernel] Disable session tracking while collecting profiler data
  [MonologBridge] Fixed support of elasticsearch 7.+ in ElasticsearchLogstashHandler
  [DoctrineBridge] Extend type guessing on enum fields
  [FrameworkBundle] Lower JsonSerializableNormalizer priority
  [Messenger] move resetting services at worker stopped into ResetServicesListener
  [Mailer] Fix Error Handling for OhMySMTP Bridge
  Fix for missing sender name in case with usage of the EnvelopeListener

Author: nicolas-grekas

DeprecationErrorHandler/Configuration.php

@@ -208,6 +208,10 @@ public function isIgnoredDeprecation(Deprecation $deprecation): bool
      */
     public function isBaselineDeprecation(Deprecation $deprecation)
     {
+        if ($deprecation->isLegacy()) {
+            return false;
+        }
+
         if ($deprecation->originatesFromAnObject()) {
             $location = $deprecation->originatingClass().'::'.$deprecation->originatingMethod();
         } else {