[libc++][ranges] Implement `ranges::remove_copy{, _if}`.

Co-authored-by: Hui Xie <hui.xie1990@gmail.com>

Differential Revision: https://reviews.llvm.org/D130599

GitOrigin-RevId: 760d2b462c04537d119d76d3cc37d2cb53774a05
15 files changed