[5.7][Concurrency] Fix ObjC weak references to actors. #42220
Merged
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Cherry-pick #42219 to
release/5.7
.Change actor destruction to call swift_deallocClassInstance instead of swift_deallocObject. When ObjC interop is enabled, swift_deallocClassInstance will check the "pure swift deallocation" bit and call into the ObjC runtime to destruct the instance when needed. This is what clears weak references and associated objects.
rdar://91270492