tests: don't specify openapi root result
tests: don't specify openapi root result

Whereas the test used to specify a body of

  [{"qiName":"referrals","qiSchema":"test"},"private"]

we see both

  [{"qiName":"authors_w_entities","qiSchema":"test"},"test"]

and

  [{"qiName":"organizations","qiSchema":"test"},"test"]

on the GHC 9.2 upgrade PR.

This changes the test to no longer expect a particular body.

Compare:
- https://github.com/PostgREST/postgrest/pull/2292#issuecomment-1146160792
- https://github.com/PostgREST/postgrest/issues/1698

steve-chavez/postgrest,steve-chavez/postgrest,begriffs/postgrest