tests: pull-image: Only skip tests for TEEs

On 1423420, I've mistakenly disabled the tests entirely, for both
non-TEEs and TEEs.

This happened as I didn't realise that `confidential_setup` would take
non-TEEs into consideration. :-/

Now, let me follow-up on that and make sure that the tests will be
running on non-TEEs.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tests/integration/kubernetes/k8s-guest-pull-image.bats

@@ -9,10 +9,14 @@ load "${BATS_TEST_DIRNAME}/lib.sh"
 load "${BATS_TEST_DIRNAME}/confidential_common.sh"
 
 setup() {
-    if [ is_confidential_runtime_class ]; then
+    if [ is_confidential_hardware ]; then
         skip "Due to issues related to pull-image integration skip tests for ${KATA_HYPERVISOR}."
     fi
 
+    if [ ! is_confidential_runtime_class ] then;
+        skip "Test not supported for ${KATA_HYPERVISOR}."
+    fi
+
     [ "${SNAPSHOTTER:-}" = "nydus" ] || skip "None snapshotter was found but this test requires one"
 
     setup_common 
@@ -22,10 +26,14 @@ setup() {
 }
 
 @test "Test we can pull an unencrypted image outside the guest with runc and then inside the guest successfully" {
-    if [ is_confidential_runtime_class ]; then
+    if [ is_confidential_hardware ]; then
         skip "Due to issues related to pull-image integration skip tests for ${KATA_HYPERVISOR}."
     fi
 
+    if [ ! is_confidential_runtime_class ] then;
+        skip "Test not supported for ${KATA_HYPERVISOR}."
+    fi
+
     # 1. Create one runc pod with the $unencrypted_image_1 image
     # We want to have one runc pod, so we pass a fake runtimeclass "runc" and then delete the runtimeClassName,
     # because the runtimeclass is not optional in new_pod_config function.
@@ -220,10 +228,14 @@ setup() {
 }
 
 teardown() {
-    if [ is_confidential_runtime_class ]; then
+    if [ is_confidential_hardware ]; then
         skip "Due to issues related to pull-image integration skip tests for ${KATA_HYPERVISOR}."
     fi
 
+    if [ ! is_confidential_runtime_class ] then;
+        skip "Test not supported for ${KATA_HYPERVISOR}."
+    fi
+
     [ "${SNAPSHOTTER:-}" = "nydus" ] || skip "None snapshotter was found but this test requires one"
 
     kubectl describe pod "$pod_name"