[Manually backport 2.x] Allow nested knn field mapping when train model#1339

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junqiu-lei merged 1 commit intoopensearch-project:2.xfrom junqiu-lei:2.x_nested_field_train_model

Dec 7, 2023

+465-8

Commits on Dec 7, 2023

Allow nested knn field mapping when train model (opensearch-project#1318 )
junqiu-lei
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