Functional coverage : no need for cvxif directed tests
Created by: AyoubJalali
Hello, this MR remove cvxif directed tests, because the CVA32A65X doesn't support S or U mode, and as it known the cvxif directed test has one job to cover S & U mode request from the CVA6 to co-pro.
A MR in core-v-verif ignore this bins if we don't support S or U mode