[llvm] Fix C++23 error in InstrProfCorrelator.h (#163554)
[1] instantiates ~unique_ptr<DwarfContext>, so that must be a complete
type.
[1]
https://github.com/llvm/llvm-project/blob/67e6a376209c9cc9576012c1c042bee9b852d584/llvm/include/llvm/ProfileData/InstrProfCorrelator.h#L182
Co-authored-by: Victor Hugo Vianna Silva <victorvianna@google.com>
