Deprecate implicit dynamic properties

Writing to a proprety that hasn't been declared is deprecated,
unless the class uses the #[AllowDynamicProperties] attribute or
defines __get()/

Deprecate implicit dynamic properties

Writing to a proprety that hasn't been declared is deprecated,
unless the class uses the #[AllowDynamicProperties] attribute or
defines __get()/__set().

RFC: https://wiki.php.net/rfc/deprecate_dynamic_properties

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Change the order of properties used for var_dump(), serialize(), comparison, etc.
Now properties are ordered according to their layout in zend_object structure.

Fixed bug #79862

While normally a private property in the active scope would take
priority, we should not use this if it has the wrong "staticness".