add detailed info about what each integration test is doing to the site

currently our make generate-docs creates this page

https://minikube.sigs.k8s.io/docs/contrib/tests/

which generates the site based on the Comments on the Test and validate the func,

I would like these descriptions to exaclty say what it is doing instead of a general text

validateBuildImage 
makes sures that minikube image build works as expected

it should say

validateBuildImage makes sures that `minikube image build` works as expected
 builds an image using `minikube image build` and 
 the Dockerfile located in test/integration/testdata/build/Dockerfile 
 which adds a relative file into a busybox container
 and then ensures the image was build using image inspect inside minikbue 
 special case :
 in case of contained it starts the buildkit inside minikube
 currently skipped on None Driver and Github Actions on MacOs,