The allocation interposition mode had a number of issues, which are
primarily addressed in the library component via
<https://github.com/ROCm/rocThrust/pull/543>. However, it is necessary
to interpose some additional symbols, which this patch does.
Furthermore, to implement this in a compatible way, we guard the new
implementation under a V1 macro, which is defined in addition to the
existing `__HIPSTDPAR_INTERPOSE_ALLOC__` one.
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