Benjamin Trent 4275a715c9
[ML] adjusting inference processor to support foreach usage (#60915) (#61022)
`foreach` processors store information within the `_ingest` metadata object.

This commit adds the contents of the `_ingest` metadata (if it is not empty).

And will append new inference results if the result field already exists.

This allows a `foreach` to execute and multiple inference results being written to the same result field.

closes https://github.com/elastic/elasticsearch/issues/60867
2020-08-12 08:34:18 -04:00
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