Azure.ClientSdk.Analyzers_0.1.1-dev.20250714.2

[Analyzers] No model factory for System types (#11197)

* [Analyzers] No model factory for System types

The focus of these changes is to update the
`ModelFactoryAnalyzer` to exclude violations for
types in the `System` namespaces unless explicitly
under `System.ClientModel`.  This change does not
impact generic type unwrapping, which remains
consistent with previous behavior.