Fix PandasArrayExtensionArray conversion to native type #1897
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lhoestq
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fix-PandasArrayExtension-conversion-to-native-type
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To make the conversion to csv work in #1887 , we need PandasArrayExtensionArray used for multidimensional numpy arrays to be converted to pandas native types.
However previously pandas.core.internals.ExtensionBlock.to_native_types would fail with an PandasExtensionArray because
I fixed these two issues and now the conversion to native types works, and so is the export to csv.
cc @SBrandeis