tests: Move pure_eval under toxgen #8913

Job	Run time
Common (pinned) (3.8, ubuntu-22.04)	3m 40s
Common (pinned) (3.7, ubuntu-22.04)	2m 58s
Common (pinned) (3.11, ubuntu-22.04)	3m 18s
Common (pinned) (3.6, ubuntu-22.04)	3m 5s
Common (pinned) (3.9, ubuntu-22.04)	3m 45s
Common (pinned) (3.10, ubuntu-22.04)	3m 26s
Common (pinned) (3.13, ubuntu-22.04)	4m 20s
Common (pinned) (3.12, ubuntu-22.04)	3m 52s
All pinned Common tests passed	2s
	28m 26s

Provide feedback