[BUG] Handle Async Query Get API result in case of first request when resultIndex is not available.

[vmmusings]

This is the first request and underlying job is still in progress.

GET {{baseUrl}}/_plugins/_async_query/00fdrfhu0ho5480m
Content-Type: application/json

{
"status": 404,
"error": {
"type": "IndexNotFoundException",
"reason": "There was internal problem at backend",
"details": "no such index [.query_execution_result]"
}
}