[ML] Datafeed should retry failures while checking for missing data

[jonathan-buttner]

Description

When the datafeed executes, this run() method: https://github.com/elastic/elasticsearch/blob/8.12/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/datafeed/DatafeedJob.java#L354 executed. If it encounters a failure it will throw a ExtractionProblemException exception and it will be retried. However if the method checkForMissingDataIfNecessary() that immediately follows is executed and it encounters a failure, it will stop the datafeed. We should investigate whether we can retry failures that occur in checkForMissingDataIfNecessary.

[elasticsearchmachine]

Pinging @elastic/ml-core (Team:ML)