phase out aliases to alloc functions
These macros are just aliases to the allocation functions, so we can use these functions directly.
Most of the macros still need to remain in os.h, until the drivers have kept up. (working on that separately).
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
These macros are just aliases to the allocation functions, so we can use these functions directly.
Most of the macros still need to remain in os.h, until the drivers have kept up. (working on that separately).