max_children top level nested restriction released wrongly

[erayarslan]

Hi,
While i was testing migrating to 7.5.2 i found and issue.

In master branch restriction seems fine but in 7.6, 7.5, 7.5.1, 7.5.2 releases has an issue.
I think in 199fff8 merge the feature is broken.

Changes should be like this

Thanks

[erayarslan]

Hi @jimczi, can you check it? old "max_children is only supported on last level of nested sort" restrictions must be deleted.

[elasticmachine]

Pinging @elastic/es-search (:Search/Search)

[jimczi]

The cherry-pick seemed to apply smoothly so I just ran the test and pushed. Thanks for checking @erayarslan and sorry for the trouble. I opened #52744.

[erayarslan]

seems okay. thank you for your time @jimczi