add test about standalone openmldb api lib

OK, but we should test that, standalone openmldb api lib can work. May be we should test in other places, e.g. a standalone cpp test with onebox cluster, or docker-compose test. Let's create a issue about it.

_Originally posted by @vagetablechicken in https://github.com/4paradigm/OpenMLDB/pull/3064#discussion_r1109262603_

The issue is about testing the standalone OpenMLDB API library. Look for existing tests involving onebox clusters or docker-compose in the repository. Determine where to add a new test—possibly in a standalone C++ test suite or a docker-compose test setup. Check the linked pull request #3064 for context on what needs to be validated. The goal is to ensure the API library works independently of the main application.

Scritto dal modello di indicizzazione a partire dal testo della issue.