Add detach API endpoint #3391

Job	Run time
Check secrets / Check secret	1s
Packaging (xenial)	4m 55s
Packaging (bionic)	4m 41s
Packaging (focal)	3m 54s
Packaging (jammy)	3m 7s
Packaging (mantic)	2m 48s
Integration (bionic, lxd-container, ubuntu-22.04)	1h 14m 40s
Integration (focal, lxd-container, ubuntu-22.04)	1h 12m 38s
Integration (jammy, lxd-container, ubuntu-22.04)	1h 5m 17s
Integration (mantic, lxd-container, ubuntu-22.04)	34m 26s
Integration (xenial, lxd-container, ubuntu-20.04)	1h 6m 2s
Integration (bionic, aws.pro, ubuntu-22.04)	43m 25s
Integration (bionic, gcp.pro, ubuntu-22.04)	48m 20s
Integration (bionic, aws.pro-fips, ubuntu-22.04)	16m 31s
	7h 20m 45s

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