Comment 3 for bug 1758989

It seems to affect some more packages/autopkgtests:
```
ubuntu-archive-tools/retry-autopkgtest-regressions --log-regex "Tunnel connection failed: 403"
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=pandas&trigger=python-xarray%2F2022.06.0-1&trigger=pytest-xdist%2F2.5.0-5&trigger=matplotlib%2F3.5.2-2&trigger=lxml%2F4.9.1-1&trigger=pytest%2F7.1.2-2
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=sphinx-automodapi&trigger=sphinx-automodapi%2F0.14.1-2
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=pytest-doctestplus&trigger=python-pip%2F22.2%2Bdfsg-1&trigger=pytest%2F7.1.2-2
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=python-pbr&trigger=python-pip%2F22.2%2Bdfsg-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=python-pip&trigger=python-pip%2F22.2%2Bdfsg-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=python-virtualenv&trigger=python-pip%2F22.2%2Bdfsg-1&trigger=distlib%2F0.3.5-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=xml2rfc&trigger=xml2rfc%2F3.13.1-1&trigger=pypdf2%2F2.6.0-1&trigger=lxml%2F4.9.1-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=arm64&package=sphinx-astropy&trigger=pillow%2F9.2.0-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=ppc64el&package=sphinx-astropy&trigger=pillow%2F9.2.0-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=metakernel&trigger=pytest%2F7.1.2-2
```