[llvm] [InstrRef] Preserve debug instr num in aarch64-cond-br-tuning. (PR #132081)

[Shubham Sandeep Rastogi via llvm-commits]

rastogishubham wrote:

https://github.com/llvm/llvm-project/pull/132087 contains the patch to add the `aarch64-cond-br-tuning` pass to the pass registry, if it is accepted, I can modify the test to be a MIR one

https://github.com/llvm/llvm-project/pull/132081