Cancel underlying aggregation query if aggregation is modified

[alexfrancoeur]

It is possible that an aggregation defined in visualize can have more impact on Elasticsearch than you intended. If an end user decides to modify an aggregation when defining a visualization, we should automatically cancel the previous aggregation query.

Utilizing the new ability to associate an ID with tasks (elastic/elasticsearch#27764) and the task management API, we should be able to automatically cancel a running query if the user has redefined the aggregation for a visualization.

Related to #14544, #17265, #17844, #17845

[alexfrancoeur]

Related to:
[Management] List / Terminate Running Tasks #18829
add search ids to requests made to elasticsearch #16493