chore: Improve coverage workflow

[romanzac]

Few changes to tweak coverage workflow to occupy less disk space and run tests.

[romanzac]

Based on tests in my fork original wf would finish successfully, but no coverage would render on codecov.io
https://github.com/romanzac/nomos-node/actions/runs/10845309954
https://app.codecov.io/gh/romanzac/nomos-node/commit/11f0a3b4b8aa7f651915e371e9b2c3e70f6549a9

Is the infrequent update on https://app.codecov.io/gh/logos-co/nomos-node/commits due to our license ?

[romanzac]

Right now, coverage workflow takes around 26 minutes. If that is too long to have it after each push, I can change it as scheduled, once a day for example?

https://github.com/romanzac/nomos-node/actions/runs/10896693219

[bacv]

Right now, coverage workflow takes around 26 minutes. If that is too long to have it after each push, I can change it as scheduled, once a day for example?

Your suggestion to have coverage workflow less frequently is great, at least for the short term. I think once a day would be a good option. Regarding the changes in PR, I would keep grcov installed with the binstall, that would use even less space.

[romanzac]

fix: schedule on 3am UTC

Changed since 01f8994

[bacv]

Looks good, thanks!