[libcxx-commits] [libcxx] [libc++][spaceship] Implements X::iterator container requirements. (PR #99343)

[Mark de Wever via libcxx-commits]

mordante wrote:

/cherry-pick [8d3252a](https://github.com/llvm/llvm-project/commit/8d3252a8987818171878a26e4298b4b5dbf2a7e9)

https://github.com/llvm/llvm-project/pull/99343