Add expandNested support to "exact_knn" query clause#2848

kaushikau wants to merge 2 commits intoopensearch-project:feature/exact-search-new-experienceopensearch-project/k-NN:feature/exact-search-new-experiencefrom

kaushikau:expand-nested-exact-knnkaushikau/k-NN:expand-nested-exact-knnCopy head branch name to clipboard