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Change summary: - Reduced IsObjectHandleTypeSafe() to just a simple bit test. The LSB must also be set to require that it's a packed ref. - Modified ResolveObjectHandleNoRead()/ResolveObjectHandleNoReadNoCheck() to update the handle only if type safe. - Modified ObjectPtr_Private::Get() to return NULL without first resolving the handle (for pointers bound to UObject subtypes). - Modified FLinkerLoad::operator<<() to serialize placeholder-typed object references as an "unsafe" packed reference only if the pointer type is unsafe. - Modified TObjectPtr::GetInternalRef() to assert if the handle is not resolved. This will catch an attempt to return an unsafe pointer as a packed reference. - Modified ToRawPtrArrayUnsafe() to assert if any item in the array is not resolved. This will catch an attempt to treat a packed reference as the element type. - Modified TContainerElementTypeCompatibility::ReinterpretRange()/ReinterpretRangeContiguous() to assert if any element of the pointer array is not resolved. - Modified ToRawPtrTArrayUnsafe() to reinterpret the pointer array through the type compatibility layer to catch any attempt to treat a packed reference as the element type. - Revised TObjectPtr natvis to reduce the placeholder intrinsic query down to just a single bit test. - Removed 'GObjectIndexToPackedObjectRefDebug' as it is no longer required for natvis support. - Revised FObjectHandle/TObjectPtr type safety unit tests to validate the unresolved state of placeholder-typed references as well as include invalid address inputs to ensure we're only using pointer semantics. #jira UE-215308 #rb Francis.Hurteau, Zousar.Shaker [CL 33975641 by phillip kavan in ue5-main branch]