Targets list in atomic testing with asset group is not accurate

[johanah29]

Description

When we add an asset group to an atomic testing, all the assets of the platform are displayed as children of the asset group.

Johanah_DELL must be the only asset displayed as an asset in Jojo AG. Also it should not be displayed as a separate asset.

[RomuDeuxfois]

Don't forget to add tests on this part

[savacano28]

This bug is solved in the pr of expectations at agent level

[savacano28]

Before:

After: