Automatic merge from submit-queue

Do not require --test_args to be set

Fixes kubernetes/kubernetes#30322

Not all jobs set `GINKGO_TEST_ARGS`, such as many of the gke tests. When this is unset all test to run (or just federated tests if in that mode).

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.kubernetes.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.kubernetes.io/reviews/kubernetes/kubernetes/30336)
<!-- Reviewable:end -->