Version 3.2.7

• Update test expectations for php 8.2.0-dev. Add #[AllowDynamicProperties] Attribute to some tests to avoid notices.
• In php 8.1+, make igbinary_unserialize check to see if an equivalent interned string already exists when unserializing object property names, array keys, and class names and use that instead of creating a brand new string.
• Avoid debug build assertion failure for HT_ASSERT_RC1 the same way as PHP's unserialize - this is a case where ostensibly there are no other references to the array being unserialized.