[Backport 2.x] Refactor Around Mapper and Mapping #1947
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Refactors FieldMapper logic. It removes the LegacyFieldMapper and replaces it with a FlatFieldMapper. The FlatFieldMapper's role is to create fields that do not build ANN indices. Additionally, it puts dimension, model_id, and knn_method_context in a new KNNMappingConfig class and adds some safety checks around accessing them. This should make calling logic easier to handle. Lastly, it cleans up the parsing so that there isnt encoder parsing directly in the KNNVectorFieldMapper. Signed-off-by: John Mazanec <[email protected]> (cherry picked from commit 2cd57e8)
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Aug 10, 2024
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Backport 2cd57e8 from #1939