DELETE document response on missing index has changed since 6.x beta

[Mpdreamz]

Given index does not exist.

DELETE /index/type/1

Used to return (atleast late as 6.0.0-alpha1) :

{
	"found": false,
	"_index": "index",
	"_type": "type",
	"_id": "1",
	"_version": 1,
	"result": "not_found",
	"_shards": {
		"total": 1,
		"successful": 1,
		"failed": 0
	},
	"_seq_no": 0,
	"_primary_term": 1
}

But now returns:

{
	"error": {
		"root_cause": [{
			"type": "index_not_found_exception",
			"reason": "no such index",
			"resource.type": "index_expression",
			"resource.id": "index",
			"index_uuid": "_na_",
			"index": "index"
		}],
		"type": "index_not_found_exception",
		"reason": "no such index",
		"resource.type": "index_expression",
		"resource.id": "index",
		"index_uuid": "_na_",
		"index": "index"
	},
	"status": 404
}

[jasontedor]

This is intended behavior, see #24518.