Change preprocessor and knowledge base to handle more than one system configuration

[joachimmetz]

Copied from add multi volume support #109

Change preprocessor and knowledge base to handle more than one system configuration

• [ ] Have a closer look at https://github.com/log2timeline/plaso/issues/4781
• [ ] have mediators directly use storage and system configurations
  • https://github.com/log2timeline/plaso/pull/4609
  • https://github.com/log2timeline/plaso/pull/4612
• [ ] have preprocessor generate system configurations
• [ ] deprecate and remove knowledge base
• [ ] Support per source path spec storage of system configuration https://github.com/log2timeline/plaso/issues/1651
• [ ] ask user to select and confirm preprocess information?