Kill off gen_bytearray_addr_access_ops.py
This hopefully fixes #23490. The relevant primop descriptions are now generated directly by genprimopcode
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PS: @oberblastmeister This conflicts with !10614 (closed); I've already ported your descriptions of the unaligned Addr# ops and left them commented out in this patch. To resolve the conflict just uncomment the relevant bits of utils/genprimopcode/AccessOps.hs
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