[libcxx-commits] [libcxx] [libc++] Partially implement P2846R6: `reserve_hint` (PR #206385)

[David Spickett via libcxx-commits]

DavidSpickett wrote:

The Buildkite build targets the old queue name. I have just stopped it. To target the newer queue name you will have to rebase this PR to include the newer version of `libcxx/utils/ci/buildkite-pipeline.yml` and it'll re-trigger the build.

If that's a problem to do now, wait until the majority of review is done.

https://github.com/llvm/llvm-project/pull/206385