Add missing async_search query parameters to rest-api-spec

[pquentin]

As an effort to reduce the delta between rest-api-spec and elasticsearch-specification.

[elasticsearchmachine]

Pinging @elastic/es-search-foundations (Team:Search Foundations)

[elasticsearchmachine]

Hi @pquentin, I've created a changelog YAML for you.

[pquentin]

💚 All backports created successfully

Status	Branch	Result
✅	8.x
✅	8.17

Questions ?

Please refer to the Backport tool documentation

[javanna]

I am not sure this is correct: see https://github.com/elastic/elasticsearch/blob/main/x-pack/plugin/async-search/src/main/java/org/elasticsearch/xpack/search/RestSubmitAsyncSearchAction.java#L62 .

Do we have a test that verifies that pre_filter_shard_size can be set via async search. I would think that should throw an error.

[javanna]

Could you next time please wait for a member of the team that the PR is tagged with, in this case Search Foundations, to review it before merging?

[pquentin]

Sorry about that. I'll wait for a team review next time. There's indeed a test:

elasticsearch/x-pack/plugin/async-search/src/test/java/org/elasticsearch/xpack/search/SubmitAsyncSearchRequestTests.java

Lines 120 to 127 in 2ed318f

	public void testValidatePreFilterShardSize() {
	SubmitAsyncSearchRequest req = new SubmitAsyncSearchRequest();
	req.getSearchRequest().setPreFilterShardSize(randomIntBetween(2, Integer.MAX_VALUE));
	ActionRequestValidationException exc = req.validate();
	assertNotNull(exc);
	assertThat(exc.validationErrors().size(), equalTo(1));
	assertThat(exc.validationErrors().get(0), containsString("[pre_filter_shard_size]"));
	}

I opened #117626 to fix it.

[javanna]

That test is a unit test around the internal behaviour. What I meant is that the only way to really know that a REST parameter is supported, is to add a quick yaml test that provides it. I am assuming this would not have worked in this PR, as the parameter is not accepted.