Archived repos visible on milestone overview page

[6543]

gitea version: 1.14.0+dev-541-g70c02b442

milestones of archived repos should be hidden on overview page

follow up of #13171

[algernon]

This appears to be fixed on main by #19882. I don't see open milestones of archived repos neither on my instance running 1.17-rc1, nor on my local test instance running main.