Use the ping command inside the health check

[loicmathieu]

Fixes #10119

Use the ping command instead of listing the databases for the health check. This allow using health check with users with low access rules.

WARNING: this implies a change inside the heath check response, it is a beaking change so it needs to be documented inside the migration guide.

An alternate solution would have been to only issue the ping command if the list database failed.

[loicmathieu]

Health check response before

{
    "status": "UP",
    "checks": [
        {
            "name": "MongoDB connection health check",
            "status": "UP",
            "data": {
                "default": "admin, config, local"
            }
        }
    ]
}

Health check response after:

{
    "status": "UP",
    "checks": [
        {
            "name": "MongoDB connection health check",
            "status": "UP",
            "data": {
                "default": "{\"ok\": 1.0}"
            }
        }
    ]
}

[geoand]

I'll remove the noteworth-feature label, since I think the breaking-change is enough :)

[geoand]

Makes sense, thanks!