Insuppressible uniques in demand signatures
In Core diffs generated using ~~a recentish ghc-HEAD~~ GHC >= 9.4 with `-dsuppress-uniques` there's some noise from demand signatures, e.g.
```diff
lvl295 :: CLabel -> Bool -> OS -> Arch -> CLabel
[GblId,
Arity=4,
- Str=<S><S><S><S>b{siAI->SC(S,C(1,C(1,C(1,C(1,L)))))},
+ Str=<S><S><S><S>b{sikH->SC(S,C(1,C(1,C(1,C(1,L)))))},
Cpr=b,
Unf=OtherCon []]
```
It would be good to update unique suppression so this noise is eliminated.
issue