WIP: Convert many primops into `foreign import prims`

We have a bunch of outline only primops which are just foreign calls. This PR goes after a wide swath of them, picking up where !1330 (closed) left off.

I am opening this PR now because I am curious about some preliminatory feedback. I mostly like the way the haskell syntax works and the work is split per phase. Trees that grow is joy to use in greenfield syntax to divide up the work. I am not so sure about the Core syntax. It seems like there are too many datatypes with no nice or clear division of labor, and I am just making the problem worse. But, of course, this could always be a sign I misunderstood the purpose of things and now am muddying it up in a different way.

to-do list:

• Draft of compiler type checks
  • Add info to all phases of haskell syntax and core
  • parser
• Do lexer changes? Should we have proper "contextual" (special id) keywords instead of just rename hacks?
• Double check structs
  • Do we need ForeignImplDecl or just stick it in CCallSpec?
• Preserve locations into GhcTc
• Relax type enforcement since polymorphism and a bunch of other stuff is allowed for foreign import prim unlike the other foreign imports.
• Probably cut commutability since neither GHC nor the primops being moved use it. It would be better to just use {-# RULES #-} anyways.
• Fix foreign import prims to actually use new stuff

CC @carter @int-index

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If you have any questions don't hesitate to open your merge request and inquire in a comment. If your patch isn't quite done yet please do add prefix your MR title with WIP:.