* Replace deprecated field `code` with `source` for stored scripts (#25127)
* Replace examples using the deprecated endpoint `{index}/{type}/_search`
with `{index}/_search` (#29468)
* Use a system property to avoid deprecation warnings after the Update
Scripts have been moved to their own context (#32096)
Adds docs for `HighLevelRestClient#multiSearch`. Unlike the `multiGet`
docs these are much more sparse because multi-search doesn't support
setting many options on the `MultiSearchRequest` and instead just wraps
a list of `SearchRequest`s.
Closes#28389