Support profile-guided optimization (PGO)

[scasagrande]

Any plans for supporting rust pgo?

Similar issue in rules_go: bazel-contrib/rules_go#3637

[UebelAndre]

I, for one, am happy to learn about it and review pull requests 😄

[scasagrande]

Sadly I don't know much about it yet, but I had a rust developer in my org ask me about it