Add builder for distance_feature to QueryBuilders

[cbuescher]

The QueryBuilders convenience class is currently missing a shortcut to construct
a DistanceFeatureQueryBuilder, which is added here.

Closes #47767

[elasticmachine]

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

[jtibshirani]

This looks good to me. I also noticed we don't have a function for the other feature query rank_feature. We could add it here too, since it's not a big change?

[cbuescher]

we don't have a function for the other feature query rank_feature. We could add it here too

@jtibshirani good call, I briefly looked into this and found that this query already has its own helper class RankFeatureQueryBuilders. Furhtermore both the query builder and the facade class live in the mapper-extras module, so they are not accessible from QueryBuilders. This is a downside of our modularization I think, but I don't see a quick way of resolving this. I will merge this as is if you don't have any other ideas and agree.

[jtibshirani]

Thanks for looking into that @cbuescher, I hadn't realized it had its own factory class because it's a plugin. I agree it makes sense to merge this as-is.