Add python bindings for ScanConsole class

• fix docker setup for CentOS 8 to use CentOS 8 Stream
• add scan_cli.py as full scan_cli and scanConsole replacement
• fix in ScanConsole class to add link creation to last scan results
• add load_config.py to test C++ command line argument and config file parsing into python
• add test_scan.py to demonstrate how to run a scan from python without local filesystem I/O
• introduce new cmake flag -DENABLE_PYTHON=1 for enabling python bindings