e2e_kubeadm: move chendave to emeritus

Technically an approver for cmd/kubeadm, so for this OWNERS
file there should be emeritus approver status.

Author: neolit123

test/e2e_kubeadm/OWNERS

@@ -8,14 +8,14 @@ reviewers:
   - neolit123
   - SataQiu
   - pacoxu
-  - chendave
   - carlory
 emeritus_approvers:
   - fabriziopandini
   - luxas
   - timothysc
   - rosti
   - ereslibre
+  - chendave
 labels:
   - area/kubeadm
   - sig/cluster-lifecycle