We can optionally add copilot as a reviewer. As per [documentation](https://docs.github.com/en/copilot/how-tos/agents/copilot-code-review/using-copilot-code-review#customizing-copilots-reviews-with-custom-instructions), we can customize the review. This PR asks it to pay attention to the kind of code that might corrupt performance data, or, in the case of sample profiling, result in poor profiles by dropping debug info.