build: enable errorlint and use modern error checking
What does this MR do?
See https://docs.gitlab.com/ee/development/go_guide/#checking-error-types
TODO
-
I added the Changelog
trailer (e.g.Changelog: feature
) to the commits that need to be included in the changelog -
I added unit tests or they are not required -
I added acceptance tests or they are not required -
I added documentation (or it's not required) -
I followed code review guidelines -
I followed Go Style guidelines