Checkmk Werk 15059: REST API: utils: remove enum in host response for TagGroup choices

ID: 15059 Title: REST API: utils: remove enum in host response for TagGroup choices Component: REST API Level: 1 Class: Bug fix Version: 2.2.0i1 The TagGroup choices allowed are set at runtime but they can be modified which was causing a 500 internal error in the REST API. This fix removes the enum and now allows any string in REST API responses for the TagGroup choices.