eb48665 frontend: provide status information for build chroots in APIv3

Authored and Committed by frostyx 4 years ago
    frontend: provide status information for build chroots in APIv3
    
    RHBZ 1813227
    
    I am naming the field `state` instead of `status` because
    
    1. We already return `state` (not `status`) for builds
    2. In our codebase `status` is a numeric value, `state` is its text
       representation