Use a script to populate parts of tox.ini #683

Job	Run time
Network (latest) (3.9, ubuntu-20.04)	4m 36s
Network (latest) (3.9, ubuntu-20.04)	4m 36s
Network (pinned) (3.6, ubuntu-20.04)	6m 59s
Network (pinned) (3.6, ubuntu-20.04)	6m 59s
Network (latest) (3.12, ubuntu-20.04)	1m 59s
Network (latest) (3.12, ubuntu-20.04)	1m 59s
Network (latest) (3.13, ubuntu-20.04)	4m 8s
Network (latest) (3.13, ubuntu-20.04)	2m 5s
Network (pinned) (3.7, ubuntu-20.04)	2m 8s
Network (pinned) (3.7, ubuntu-20.04)	2m 8s
Network (pinned) (3.8, ubuntu-20.04)	8m 22s
Network (pinned) (3.8, ubuntu-20.04)	8m 22s
Network (pinned) (3.9, ubuntu-20.04)	5m 15s
Network (pinned) (3.9, ubuntu-20.04)	5m 15s
Network (pinned) (3.10, ubuntu-20.04)	9m 18s
Network (pinned) (3.10, ubuntu-20.04)	9m 18s
Network (pinned) (3.11, ubuntu-20.04)	8m 53s
Network (pinned) (3.11, ubuntu-20.04)	8m 53s
Network (pinned) (3.12, ubuntu-20.04)	10m 58s
Network (pinned) (3.12, ubuntu-20.04)	10m 58s
Network (pinned) (3.13, ubuntu-20.04)	1m 58s
Network (pinned) (3.13, ubuntu-20.04)	1m 58s
All pinned Network tests passed	1s
All pinned Network tests passed	1s
	2h 7m 7s

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