Revert "[libc++] Remove the type_traits includes from limits and new"

type_traits doesn't need to include __type_traits/noexcept_move_assign_container.h, so there is no include cycle from <limits> or <new>. Restore their includes of type_traits to preserve compatibility.

This reverts commit 2af6d79c7e38675a184280a2d6a92550702581f7.

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D154747

GitOrigin-RevId: 6c47654efd36dd8fdbf089b485a1c594a354e421