Add --no-auto-dependencies to distro layer validation

🎯 Focused Layer Validation:
- Add --no-auto-dependencies flag to yocto-check-layer
- Validate only the distro layer, not all dependencies automatically
- Provides more targeted and controlled validation
- Reduces validation scope and potential false positives

This ensures the distro layer is validated independently
without automatically checking all its dependencies.

Author: Alex J Lennon

.github/workflows/distro-layer-validation.yml

@@ -270,10 +270,11 @@ jobs:
         echo "Testing basic recipe parsing..."
         bitbake -p || echo "Parse test completed"
         
-        # Run the layer check
+        # Run the layer check (only check current layer, not dependencies)
         echo "Running yocto-check-layer..."
         python3 ../build/layers/openembedded-core/scripts/yocto-check-layer \
           --layer .. \
+          --no-auto-dependencies \
           --output-log ../distro-layer-check-${{ matrix.yocto_branch }}.log \
           || echo "yocto-check-layer completed with issues"