[llvm] [Sample Profile] Check hot callsite threshold when inlining a function with a sample profile (PR #93286)

[David Li via llvm-commits]

david-xl wrote:

> Internal load testing showed there's no regression, I am not sure if there is a public load test that uses sample profile (I am looking at https://llvm-compile-time-tracker.com/ but I don't think any uses it)

Internal test is fine.

https://github.com/llvm/llvm-project/pull/93286