Description

This issue is to track adding chunked rest encoding to our various search APIs. Linked to #89838

• SearchResponse Add XContent chunking to SearchResponse #94736
• MultiSearchResponse Add XContent chunking to SearchResponse #94736
• AsyncSearchResponse Make AsyncSearchResponse use Chunked ToXContent streaming #98380
• SearchTemplateResponse Add chunked xcontent handling to SearchTemplateResponse #99184

We will also investigate adding further chunking to SearchResponse, which currently does not break up aggregations.