[llvm] [BOLT] Gadget scanner: refactor issue reporting (PR #135662)

[Anatoly Trosinenko via llvm-commits]

atrosinenko wrote:

I updated the PR description to reflect the improvements made throughout the review.

I believe this patch is ready for review again, as there are no more unresponded comments and its predecessor PRs were finally unblocked and merged.

https://github.com/llvm/llvm-project/pull/135662