Sky Occlusion checkbox is not disabled and no warning is displayed when no Lighting Settings Asset is assigned

Steps to reproduce:

1. Create and open a new URP 3D project
2. Open Window -> Rendering -> Lighting window
3. Make sure no Lighting Settings asset is assigned in the "Scene" tab
4. Open the "Adaptive Probe Volumes" tab in the Inspector
5. Click on 'Open' in the Inspector
6. Set the Light Probe System to "Adaptive Probe Volumes" in the Render Pipeline Asset window
7. Observe the field "Sky Occlusion"

Actual results: The checkbox is enabled

Expected results: The checkbox is disabled (grayed out) for 6000.5 and below but should not affect the setting from 6000.6 and going forward

Reproducible with versions: 6000.3.0a2, 6000.3.21f1, 6000.5.6f1, 6000.6.0b6, 6000.7.0a3

Not reproducible with versions: 6000.0.80f1, 6000.3.0a1

Tested on (OS): Windows 11 Pro (25H2)

Notes:

• When generating lighting, the Sky Occlusion checkbox will toggle off without any indication