[BUG] Test with parameter expand_wildcards set to none does not return data

[Jakob3xD]

What is the bug?

We have tests that set the parameter expand_wildcards: none, which makes the tests useless as the requests does not return useful content.

How can one reproduce the bug?

GET /_stats?expand_wildcards=none
{
  "_shards": {
    "total": 0,
    "successful": 0,
    "failed": 0
  },
  "_all": {
    "primaries": {},
    "total": {}
  },
  "indices": {}
}

What is the expected behavior?

Remove the combination expand_wildcards with value none so the tests return actual data.

Do you have any additional context?

Notices this while working on the Human fields MR as the test should have failed due to missing fields.

[dblock]

Makes sense. To keep in mind that we do want to test the spec, not the functionality of OpenSearch. It's however good to have meaningful tests as we will use those as examples for auto-generating documentation.