[llvm] [Inliner] Don't apply the cold-callsite threshold in non-callable functions (PR #211255)

[Spencer Bryngelson via llvm-commits]

sbryngelson wrote:

@arsenm this has been approved since Jul 31 and CI is green. I do not have commit access (requested in #214732), so it needs someone else to land it. Could you push it when you get a chance?

https://github.com/llvm/llvm-project/pull/211255