[libc++] Make __wrap_iter constexpr
`__wrap_iter` is currently only constexpr if it's not a debug built, but it isn't used in a constexpr context currently. Making it always constexpr and disabling the debugging utilities at constant evaluation is more usful since it has to be always constexpr to be used in a constexpr context.
Reviewed By: ldionne, #libc
Spies: libcxx-commits
Differential Revision: https://reviews.llvm.org/D114733
GitOrigin-RevId: 6146e4cf89dbd5d9627c4694e0bea9d4c0fc6e0b
2 files changed