require codecov patch % to be 100%

[jakkdl]

The status quo is for patch coverage to be greater than or equal to the project% (currently 96.87%), which means that in practice it's 100% .. except if a PR is big enough, at which point a couple lines can sneak through.
I just merged #13192 which had 98.26% coverage for no reason, I'll add more tests and stuff in a followup to retroactively get it to 100%.

[nicoddemus]

I recall in the past we did not use this configuration because codecov was proving to be unreliable, but that was many years ago so let's hope the experience is better this time. 🤞

[webknjaz]

It's much more stable these days, yes.

[Pierre-Sassoulas]

It's possible to bypass with admin rights (for exemple if you remove a bunch of well covered code the coverage percentage decrease and it's ok).

[jakkdl]

I think even with unreliable codecov there's rarely gonna be difference between 96.87% and 100%, and yeah it's possible to override or rerun failed uploads. But 🤞 indeed

[RonnyPfannschmidt]

#12017 just demonstrated this is a good idea

there was stuff i actually missed - and before it would have missed

also im under the impression sentry is slowly getting codecov better