[clang] [Sema] Substitute parameter packs when deduced from function arguments (PR #79371)

[Erich Keane via cfe-commits]

erichkeane wrote:

> @cor3ntin @erichkeane Thank you for checking the updates on my PR. I fixed the typo and added the release notes. Also rebased the branch.

Looks like the release notes change failed CI.

https://github.com/llvm/llvm-project/pull/79371