Changes:
* ba78036502bce7866f98d53e1c51763fa3503ab8 fix(ci): Move debs correctly
* 91ffad2d77e115e7f25735dde955042fac023d73 feat(ci): Add Debian packages to Github release
* d2dd784f52adf18feafe53eaa83a2c49e1ecdd24 fix(deb package): build depend on dh-python
* 83d10be5f23f743da028728fc90541287cbe3c37 fix(ci): Non-interactively install packages
* 32584c73ce919acfe5f2f34b6e56ae4571ec6477 feat(ci, deb package): Build for bionic, buster, focal
* 4e115cea5956bdd6223e689a3e72e8977116040c fix(ci, deb package): Only try and build Python 3
* cc5e7aa9c1dcb53b489856c98d0687ec110b9b92 refactor(ci): Use own containers
* 5d34237e037722cf801fc791a5145cf313bb6784 revert container
* a480e7965fc73465ec5b3537e5b1887d6c065acd wip: Try in-container build
* 4cb9ada8380cb709c3f81d576eed32d1a58e41a7 fix(ci): Move artifact to staging directory
<details><summary><b>See More</b></summary>
* e77a6c2af5c3c4ffa6b11367dc807b195a714d80 fix(ci): choose correct agent
* 5f5a243e0de53efbc55be6726cebf4939d91826a feat(packaging): Build Debian Packages
* 97ac38cd9c1837075cd7c91e7e9d31435e0440a7 fix(packaging): ensure that test files do not end up in the package
* 074366b5df78fd53d1b09ae7b11f470c13118fe2 fix(cert validation): Decode principals as a list
This list of changes was [auto generated](https://dev.azure.com/glaux/update-broker/_build/results?buildId=101&view=logs).</details>