gha: Add the ability to also test Dragonball

With the changes proposed as part of this PR, an AKS cluster will be
created but no tests will be performed.

The reason we have to do this is because GitHub Actions will only run
the tests using the workflows that are part of the **target** branch,
instead of the using the ones coming from the PR, and we didn't find yet
a way to work this around.

Once this commit is in, we'll actually change the tests themselves (not
the yaml files for the actions), as those will be the ones we want as
the checkout action helps us on this case.

Fixes: #6583

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

tests/integration/kubernetes/run_kubernetes_tests.sh

@@ -54,6 +54,10 @@ else
 	)
 fi
 
+if [ ${KATA_HYPERVISOR} == "dragonball" ]; then
+	exit 0
+fi
+
 # we may need to skip a few test cases when running on non-x86_64 arch
 arch_config_file="${kubernetes_dir}/filter_out_per_arch/${TARGET_ARCH}.yaml"
 if [ -f "${arch_config_file}" ]; then