Feature Request: Add a ‘detach all’ option for prefabs

[carbonated-peter]

Add a ‘detach all’ option for prefabs. Detaching a slice only happens on the selected slice entity, we could use a ‘detach all children’ option, if we have hundreds of entities, do we have to do each by hand? Having to detach nested prefabs one entity at a time is painfully slow especially if we have a lot to get through.

I don't know of any alternate solutions except to spend time doing this by hand.

Here's a video showing the current 'detach prefab' on a nested prefab and how long this takes. We have nested prefabs that are much larger. The groups also collapse so you have to go and open up the hierarchy every time you do one 'detach'.
https://github.com/o3de/o3de/assets/50999342/03fd0c16-ec14-43d3-a091-7b597b1a4dbb

Found in Branch
https://github.com/carbonated-dev/o3de
Commit ID from o3de/o3de Repository
custom engine version 2310.2

Desktop/Device:
Device: [PC]
OS: [Windows]
Version [10]
CPU [Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz, 3501 Mhz, 6 Core(s), 12 Logical Processor(s)]
GPU [NVIDIA GeForce RTX 3090]
Memory [32GB]