Rollup merge of #136336 - nnethercote:overhaul-rustc_middle-util, r=jieyouxu

Overhaul `rustc_middle::util`

It's an odd module with some odd stuff in it.

r? `@Noratrieb`
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Matthias Krüger 2025-01-31 12:28:20 +01:00 committed by GitHub
commit 5a2b27486a
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