[libcxx-commits] [libcxx] [libc++] Fix ambiguity when using std::scoped_allocator constructor (PR #80020)

[Mark de Wever via libcxx-commits]

https://github.com/mordante approved this pull request.

LGTM modulo one comment.
I spend a bit of time hunting for the real changes, I would have preferred to split this in two commits.

https://github.com/llvm/llvm-project/pull/80020