Use @grafana/beyla as CODEOWNERS for beyla component

[marctc]

PR Description

Use @grafana/beyla instead of only @marctuduri to be the owner of the beyla.ebpf component.

PR Checklist

• CHANGELOG.md updated
• Documentation added
• Tests updated
• Config converters updated

[marctc]

I think we need add Beyla team as collaborator of the repo, because I'm seeing this:

Unknown owner on line 25: make sure the team @grafana/beyla exists, is publicly visible, and has write access to the repository

[wildum]

not sure if I can do that, maybe @mattdurham knows

[ptodev]

I added @grafana/beyla as maintainers to the Alloy repo just now.

@mattdurham made me a temporary admin yesterday, because I have to do some GitHub actions work :)