source: properly fix _apt permissions warning

the chown command needed running within the chroot, since apt-get is being run within the chroot and _apt might have a different UID there than on the host.

Gbp-Dch: Short Closes: #953957

added 3 commits

• ac659d43...c0ff2e6d - 2 commits from branch live-team:master
• b25db0a4 - source: properly fix _apt permissions warning

Compare with previous version

enabled an automatic merge when the pipeline for b25db0a4 succeeds

merged