QueryIndexManager GetAllIndexes returns no indexes

The query statement used at QueryGenerator to get all the indexes does not find any indexes on the server when I test it against 7.1.0.

No indexes are found whether the index is bucket based, or scope/collection based.

I've found that this query statement works for getting bucket-level indexes:

     return       "SELECT i.* FROM system:indexes AS i" +

                       $" WHERE ((bucket_id IS MISSING AND keyspace_id = \"{bucketName}\") OR bucket_id = \"{bucketName}\")" +

                       " AND `using` = \"gsi\"" +

                       " ORDER BY is_primary DESC, name ASC";

And the Java and Gocb SDKs are using the following query statments to get the indexes whether looking for indexes at a bucket-level, scope-level, or collection-level: Java example. So I think the .NET should use these statements.

I've added some QueryIndexManager tests that currently fail due to this bug https://review.couchbase.org/c/couchbase-net-client/+/170670