e2e: add podsecuritycontext fsgroup for normal user validation

considering the pod has run as normal user, the fsgroup has also
set to the same.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
(cherry picked from commit 7ff048bf1e)

e2e/utils.go

@@ -333,6 +333,7 @@ func validateNormalUserPVCAccess(pvcPath string, f *framework.Framework) error {
 			},
 		},
 		Spec: v1.PodSpec{
+			SecurityContext: &v1.PodSecurityContext{FSGroup: &user},
 			Containers: []v1.Container{
 				{
 					Name:    "write-pod",