"Inherit attribute is not supported" warning is shown but attributes are available in VFX Graph Output and Update blocks

How to reproduce:
1. Create a new Unity project and install the Visual Effects package
2. Create any VFX Graph
3. In the Output block, add any property with "From Source" attribute (e.g. Set Size From Source")
4. Observe the property

Expected results: No warnings are show or these attributes are not available
Actual results: Inherit attribute is not supported in Update and Output contexts"

Reproducible with: 6000.0.61f1, 6000.2.8f1, 6000.3.0b8, 6000.4.0a3

Reproducible on: macOS Sequoia 15.6 (M1)
Not reproducible on: No other environment tested