In current e2e case, we test AWS ambient credentials using "ClusterIssuer".
As OCP-65035(automated by cert-manager-operator/pull/166) has covered GCP ambient credentials using "ClusterIssuer", we intend to add a new e2e case to cover AWS ambient credentials using "Issuer" with flag `--issuer-ambient-credentials`. Just as polarion case OCP-65033 tested.