[llvm] [llvm-profgen] Add pgo accuracy metrics (PR #93975)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> Yes, we can. We only need bbaddrmap setcion information in a binary. But for the tool llvm-profgen, i think it's normal to use binary as input.

Just because it's the norm does not mean it's good. Having a binary in the tree makes things significantly harder to audit from a security perspective, on top of making the test significantly less readable without using an external tool like `llvm-objdump`. If a test involving a binary can be written using `yaml2obj`, it should be.

https://github.com/llvm/llvm-project/pull/93975