[clang] [Clang][P1061] Add stuctured binding packs (PR #121417)

[via cfe-commits]

cor3ntin wrote:

> Does this mean we should adjust the cxx_status page to not say Clang 20? I also see there is a conflict with the ReleaseNotes.md where it appears all of the C++2c items no longer exist. (I guess that is because it is for the next release.)

Meh, let's assume 20 and we can edit it later if we end up not merging, I think.
And yes, the release notes have been reset for 21, I guess you can remove the entry entirely to make it easier to cherry-pick to 20 

https://github.com/llvm/llvm-project/pull/121417