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Handle tracing of ExtractSelection filter specially

Cory Quammen requested to merge cory.quammen/paraview:19400-trace-extract-selection into master

ExtractSelection has a proxy property for the selection source input. Selection source proxies do not have an Accessor registered in the Trace object. Hence, when we trace the creation of an ExtractSelection proxy and the current selection is copied to a new selection source proxy in vtkSMExtractSelectionProxyInitializationHelper and set as the proxy's "Selection" property, an Untraceable exception would be thrown while the ExtractSelection's properties were processed.

A reference to the selection source is not necessary as functions for creating selections are available in the paraview.selection module, so we can safely not trace it. Skip tracing this property this by creating and instantiating a custom PipelineProxyFilter that skips tracing of the "Selection" property.

Closes #19400 (closed)

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