[llvm] [llvm][release] Add links to automatically built packages on release page (PR #147021)

[David Spickett via llvm-commits]

DavidSpickett wrote:

In theory we could modify the release audit job to find any hidden links and see if their files have been uploaded yet. If you would like me to pursue that, I can, but I'll do it as an add on to this as there's already a lot here.

https://github.com/llvm/llvm-project/pull/147021