feat: run tests container migrated to new base and code images
    
    usage of new base and code images (c8s rpm, f36 rpm, f36 pip)
    new functions added to avoid code repetition for repeating tasks..
    parameter --rebuild (all images) and --rebuild-code (only code images) added.
    by default, containers only get build if the not exist on the local system yet,
    previous images were always build and had to be skipped manually (--skip-build).
    
    Signed-off-by: Dominik Wombacher <dominik@wombacher.cc>