Merge branch '7.3' into 7.4

* 7.3:
  Fix remaining SplObjectStorage deprecation
  Remove calls to no-op functions, deprecated in PHP 8.5
  Remove deprecated calls to deprecated methods of SplObjectStorage
  [Messenger] Show package installation hint also for amqps
  [TypeInfo] Fix converting list to string

Author: nicolas-grekas

Tests/Caster/SplCasterTest.php

@@ -147,7 +147,7 @@ public static function provideCastSplDoublyLinkedList()
     public function testCastObjectStorageIsntModified()
     {
         $var = new \SplObjectStorage();
-        $var->attach(new \stdClass());
+        $var[new \stdClass()] = null;
         $var->rewind();
         $current = $var->current();
 
@@ -158,7 +158,7 @@ public function testCastObjectStorageIsntModified()
     public function testCastObjectStorageDumpsInfo()
     {
         $var = new \SplObjectStorage();
-        $var->attach(new \stdClass(), new \DateTimeImmutable());
+        $var[new \stdClass()] = new \DateTimeImmutable();
 
         $this->assertDumpMatchesFormat('%ADateTimeImmutable%A', $var);
     }