Issue 48989 - Delete slow lib389 test
    
    Bug Description:
    Currently this test runs around 10-15 minutes. This is really slow.
    There is a cmocka test for counters in the code base:
    test/libslapd/counters/atomic.c
    We don't need to test them using lib389.
    
    Fix Description:
    Delete the slow test.
    
    https://pagure.io/389-ds-base/issue/48989
    
    Reviewed by: wibrown (Thanks!)