Add performance improvements to alert comment

[414owen]

Example of improvement: https://github.com/414owen/outlines-core/pull/5 Example of regression: https://github.com/414owen/outlines-core/pull/6

Reports can contain both at once, of course.

@ktrz

[ktrz]

hi @414owen Sorry for taking so long to get back to you! Thank you for this contribution! As you might see we have failing tests in this PR. Could you please have a look at those and update them to match the new proposed output format? If we are missing tests for the case of improvements please do add them.

[414owen]

@ktrz this should be good to review now