The way that a CodeChecker instance is found/configured needs refactoring.

[vodorok]

The new design should be a based on a locator service. This could be implemented in several ways.

• Get from environment variables <- this would be default.
• Set the path to the pre-built binary if not found before.
• Or set the path to the custom built binary with virtual environment.

[vodorok]

The configuration mentioned in the title, is related to the gui.

[vodorok]

This is in relation with #152