Fix zend_get_property_info_for_slot() for lazy objects (#15855)

zend_get_property_info_for_slot(obj, slot) assumes that 'slot' belongs to 'obj', but that may not be the case for lazy proxies

Fix zend_get_property_info_for_slot() for lazy objects (#15855)

zend_get_property_info_for_slot(obj, slot) assumes that 'slot' belongs to 'obj', but that may not be the case for lazy proxies.

Fortunately, the property info is often already available in path when it is needed.

For other cases, I make zend_get_property_info_for_slot() aware of lazy objects, and add zend_get_property_info_for_slot_self() for cases where the 'slot' is known to belong to the object itself.

Fixes oss-fuzz #71446

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