[llvm] [Transforms] Refactor CreateControlFlowHub (PR #103013)

[Sameer Sahasrabuddhe via llvm-commits]

ssahasra wrote:

I just pushed the squashed patch to main, I was not aware that pushing directly to main does not close the PR! Not sure how to mark this PR as submitted.

https://github.com/llvm/llvm-project/pull/103013