[FEATURE] added where not functionality

- added functionality for add where not statements to list builder

- [x] test coverage
- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets | 
| BC Breaks     | no, i don't think so
| Doc           | 

Instead of duplicating code from lines 152 to 157 and 161 to 166 it would be nice to have a general `getWheres`-function, where you would pass the parameter (`=` or `!=` for now, later also maybe `>`, `<`, ...).