Benjamin Trent 7c81cd7833
[ML] explicitly disallow partial results in datafeed extractors (#55537) (#55585)
Instead of doing our own checks against REST status, shard counts, and shard failures, this commit changes all our extractor search requests to set `.setAllowPartialSearchResults(false)`.

- Scrolls are automatically cleared when a search failure occurs with `.setAllowPartialSearchResults(false)` set.
- Code error handling is simplified

closes https://github.com/elastic/elasticsearch/issues/40793
2020-04-22 09:07:44 -04:00
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