Tests

Add poetry as CI container build dependency #2157

Job	Run time
build-deb	21m 18s
macOS	2m 38s
windows	6m 7s
install-deb (ubuntu-20.04, ubuntu, 20.04)	2m 14s
install-deb (ubuntu-22.04, ubuntu, 22.04)	2m 15s
install-deb (ubuntu-23.04, ubuntu, 23.04)	2m 7s
install-deb (ubuntu-23.10, ubuntu, 23.10)	2m 12s
install-deb (debian-bullseye, debian, bullseye)	1m 57s
install-deb (debian-bookworm, debian, bookworm)	2m 7s
install-deb (debian-trixie, debian, trixie)	1m 57s
	44m 52s

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