SearchServiceTests.testParseSourceValidation failure

[drempapis]

This test has been failing due to #113081, which deleted the incoming search validation on the data node for bwc.

In this work, #105150, validation has been moved to the coordinate nodes. The following is a matrix of the validation Exception messages of the SearchService moving to SearchRequest, including a test creation checking.

SearchService:validateSearchSource                                                   SearchRequest:validate        SearchRequestTest::testValidate
 
	"disabling [track_total_hits] is not allowed in a scroll context. Yes yes
	`search_after` cannot be used in a scroll context. 				    yes                            yes
	`from` parameter must be set to 0 when `search_after` is used.                      yes                            yes
	cannot use `collapse` in a scroll context                                           yes                            yes
	cannot use `collapse` in conjunction with `rescore`                                 yes                            yes
	[slice] can only be used with [scroll] or [point-in-time] requests                  yes                            yes 
	[stored_fields] cannot be disabled if [_source] is requested                        yes                            yes
	[stored_fields] cannot be disabled when using the [fields] option"                  yes                            yes

[elasticsearchmachine]

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

[elasticsearchmachine]

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

[javanna]

LGTM thanks!

[javanna]

I think that you can delete the assertCreateContextValidation method too

[drempapis]

Done!

[javanna]

Don't forget to close #115936 once this gets merged ;)