[llvm] Add minimum count threshold for indirect call promotion (PR #145282)

[Snehasish Kumar via llvm-commits]

snehasish wrote:

### Merge activity

* **Jun 26, 7:09 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/145282).


https://github.com/llvm/llvm-project/pull/145282