This is so jobs-api will start using them. This is one more step towards elimination the differences between webservice and jobs-api.
- change jobs-api to support detecting -web and non -web container images the same (so existing jobs show with the same job image than new jobs using the new -web container image)
- this would require refactoring jobs-api so that if image is not found, resolve to closest variant. e.g.: docker-registry.tools.wmflabs.org/toolforge-golang111-sssd-web ---> resolved to ---> docker-registry.tools.wmflabs.org/toolforge-golang111-sssd-base and vice versa. This is so we can keep resolving jobs-framework variant images, even after we've switched to using webservice variant images in the image-config. After the change in image-config, we'll want to continue resolving images like. See T409191 for context.
- change image-config to add a new 'image' property for each entry outside the 'variants', with the web container image in it
- change jobs-api to use the new top-level image-config image entry
- delete the old jobs-framework variant from image-confing