4d7a80d486
make `typeid::typeid_itanium_cxx_abi::transform_ty` evaluate length in array types the ICE in https://github.com/rust-lang/rust/issues/114275 was caused by `transform_ty` in compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs encountering an unevaluated const, while expecting it to already be evaluated.