replace errors.Errorf by fmt.Errorf

[mmorel-35]

Checklist prior to review

• Link to relevant issue as well as docs and UI issues --
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
  • Don't forget ci/ labels to run additional/fewer tests
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label) --

[lahabana]

While I agree we should part from github.com/pkg/errors I think the presence of the stacktrace in these errors is nice and we should think more methodically about a replacement: pkg/errors#245

I've opened: #8390 to think a little more about this. I think it may be useful to open a MADR to decide when we should have stacktraces and when we shouldn't

[jakubdyszkiewicz]

Triage: Thanks for the contrib, but we decided to stay with pkg/errors