Jan Fajerski

Replace go-kit/log with log/slog

1

### Proposal As @SuperQ proposed on Slack, the 3.0 release would be a good opportunity to replace `go-kit/log` with `log/slog`. Afaiu the goal is to keep the log output format...

ci: Add job to report build_all status

2

This should enable proper status reporting of matrix jobs for release branches. See also https://github.com/orgs/community/discussions/4324. The branch protection rule(s) for release branches need to be changed too.