[FEATURE] Highlight feature in hybrid query

[vibrantvarun]

Currently, hybrid query does not support highlight feature. Documentation https://opensearch.org/docs/latest/search-plugins/searching-data/highlight/ . The query shape mentioned below just returns hybrid query response and does not contain highlight field data.

{
    "query": {
        "hybrid": {
            "queries": [
                {
                   query 1
                },
               {
                   query 2
               }
            ]
        }
    },
    "highlight": {
        "fields": {
            "field 1": {}
        }
    }
}