build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/csi-translation-lib/README.md

@@ -0,0 +1,30 @@
+## Purpose
+
+This repository contains functions to be consumed by various Kubernetes and
+out-of-tree CSI components like external provisioner to facilitate migration of
+code from Kubernetes In-tree plugin code to CSI plugin repositories.
+
+Consumers of this repository can make use of functions like `TranslateToCSI` and
+`TranslateToInTree` functions to translate PV sources.
+
+## Community, discussion, contribution, and support
+
+Learn how to engage with the Kubernetes community on the [community
+page](http://kubernetes.io/community/).
+
+You can reach the maintainers of this repository at:
+
+- Slack: #sig-storage (on https://kubernetes.slack.com -- get an
+  invite at slack.kubernetes.io)
+- Mailing List:
+  https://groups.google.com/forum/#!forum/kubernetes-sig-storage
+
+### Code of Conduct
+
+Participation in the Kubernetes community is governed by the [Kubernetes
+Code of Conduct](code-of-conduct.md).
+
+### Contibution Guidelines
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) for more information.
+