From 316d423648a1159761178dae82cb5cabfcb0233e Mon Sep 17 00:00:00 2001
From: Michael Bischoff <michael.bischoff@elastic.co>
Date: Mon, 2 Aug 2021 20:20:05 +0200
Subject: [PATCH] Non indexable policy: death letter index (#26952)
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Adding functionality to death letter index instead of dropping events.

When there's a mapping conflict events are dropped, this commits allows one attempting to index it into a different index instead so it can be re-ingested later vs dropping or stalling ingest. The index currently must reside on the same ES cluster.

* buildCollectPublishFails and other functions changed to be a function of Client so not to have to pass arguments

Co-authored-by: Noémi Ványi <kvch@users.noreply.github.com>
(cherry picked from commit 60cf09dcfc133027ff2fd0f9caf223705693a79d)