One of the limitations of GH actions is the inability of running Bandwidth Manager feature on our CI as described in the "cons" section in #25713

To provide the same coverage we should add a test for this functionality in the connectivity tests of cilium-cli as it would be nice to test this feature.

The ginkgo test can be found in https://github.com/cilium/cilium/blob/ad36a8c65cd944cd8cbf227e383304f9c14c0ab8/test/k8s/bandwidth.go