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/component-base/featuregate/OWNERS

@@ -0,0 +1,16 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+# Currently assigned to api-approvers since feature gates are the API
+# for enabling/disabling other APIs.
+
+# Disable inheritance as this is an api owners file
+options:
+  no_parent_owners: true
+approvers:
+  - api-approvers
+reviewers:
+  - api-reviewers
+labels:
+  - kind/api-change
+  - sig/api-machinery
+  - sig/cluster-lifecycle