Remove `RegionExt`; move methods to `Region` in `rustc_type_ir` - #160509

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Jamesbarford wants to merge 2 commits into

rust-lang:mainfrom

Jamesbarford:chore/shrink-region-ext-triats-pt2

Commits on Aug 7, 2026

Implementation change for removing RegionExt
Jamesbarford
committed
4ca4e6e
update imports and method signature changes
Jamesbarford
committed
1625ceb