Add support for making lib features internal#118123

Merged

bors merged 2 commits intorust-lang:masterfrom

RalfJung:internal-lib-features

Dec 6, 2023

Commits on Nov 21, 2023

lib features ending in '_internals?' are internal
RalfJung
committed

Commits on Nov 22, 2023

also make 'core_intrinsics' internal
RalfJung
committed