Use Word64 Unique on GHC 9.10+ (copy #2857) #2859
Merged
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This fixes a left-over from the GHC 9.10 upgrade where we kept Clash's Unique to be an Int, while GHC's Unique became a Word64 (see #2758)
Now there is no longer a possibility for overflow when converting a GHC Unique to a Clash Unique.
As part of this PR we copy the source from the package https://hackage.haskell.org/package/concurrent-supply and have it generate Clash Unique values instead of Int.
This is an automatic copy of pull request #2857 done by [Mergify](https://mergify.com).