PR Summary

Fix #9313

The root problem is that a scope is holding on the shared default TypeResolutionState object when there is no PowerShell class defined in the parent chain of the scope, and then the TypeResolutionState object is used as a key to cache the found type.
A scope should not hold on to the default TypeResolutionState object, but should always refer to the parent's TypeResolutionState object when no PowerShell class defined in itself. When a PowerShell class is defined in a scope, a new TypeResolutionState will be created for the specific scope.

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