[ES|QL] move query string after field name list

[fang-xing-esql]

This is just a POC, definitely needs some cleanups, the existing multi_match tests won't work as it has new signature, here is an example.

curl -u elastic:password -X DELETE "localhost:9200/books/"
curl -u elastic:password -X POST "localhost:9200/books/_doc?pretty" -H 'Content-Type: application/json' -d'
{"name": "Snow Crash", "author": "Neal Stephenson", "release_date": "1992-06-01", "page_count": 470, "*name": "*Snow Crash"}
'

curl -u elastic:password -X POST "localhost:9200/_bulk?refresh&pretty" -H 'Content-Type: application/json' -d'
{ "index" : { "_index" : "books" } }
{"name": "Revelation Space", "author": "Alastair Reynolds", "release_date": "2000-03-15", "page_count": 585, "*name": "*Revelation Space"}
{ "index" : { "_index" : "books" } }
{"name": "1984", "author": "George Orwell", "release_date": "1985-06-01", "page_count": 328, "*name": "*1984"}
{ "index" : { "_index" : "books" } }
{"name": "Fahrenheit 451", "author": "Ray Bradbury", "release_date": "1953-10-15", "page_count": 227, "*name": "*Fahrenheit 451"}
{ "index" : { "_index" : "books" } }
{"name": "Brave New World", "author": "Aldous Huxley", "release_date": "1932-06-01", "page_count": 268, "*name": "*Brave New World"}
{ "index" : { "_index" : "books" } }
{"name": "The Handmaids Tale", "author": "Margaret Atwood", "release_date": "1985-06-01", "page_count": 311, "*name": "*The Handmaids Tale"}
'

+ curl -u elastic:password -H 'Content-Type: application/json' '127.0.0.1:9200/_query?format=txt' -d '{
    "query": "from books | where multi_match(author, name, \"neal\", {\"fuzziness\": 1})"
}
'
     *name     | *name.keyword |    author     |author.keyword |     name      | name.keyword  |  page_count   |      release_date      
---------------+---------------+---------------+---------------+---------------+---------------+---------------+------------------------
*Snow Crash    |*Snow Crash    |Neal Stephenson|Neal Stephenson|Snow Crash     |Snow Crash     |470            |1992-06-01T00:00:00.000Z