CLI: Remove `--auto` flag #1436

Job	Run time
Code	1m 4s
System (1.22.x, add)	31m 11s
System (1.22.x, instances)	33m 45s
System (1.22.x, basic)	1h 29m 20s
System (1.22.x, recover)	21m 4s
System (1.22.x, interactive)	1h 51m 5s
System (1.22.x, mismatch)	25m 8s
System (1.22.x, preseed)	26m 34s
documentation-checks / Run documentation checks	1m 3s
Trigger snap edge build	0s
	5h 40m 14s

Provide feedback