Auto merge of #114672 - lenawanel:master, r=compiler-errors

make `typeid::typeid_itanium_cxx_abi::transform_ty` evaluate length in array types

the ICE in rust-lang/rust#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.

Author: bors