Issue 50545 - Port remaining legacy tools to new python CLI
    
    Description:
    Created sanity tests for repl-monitor, dbverify, ldifgen (dbgen) and fixup task
    into separate files for each tool.
    All tests check output syntax to make sure the tool did not fail with error.
    Tests for dbgen create ldif files, that are imported to database and
    then check if entries are imported correctly.
    
    Relates: https://pagure.io/389-ds-base/issue/50545
    
    Reviewed by: spichugi (Thanks!)