Merge pull request #66723 from dims/enable-etcd-logging-in-local-e2e-jobs

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

enable etcd logging in local-e2e jobs

**What this PR does / why we need it**:

We are not saving the etcd logs and just redirecting the output
to /dev/null. In this change, we set ETCD_LOGFILE to the same
directory where we log other kube relates processes.


**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:
See example run in http://gcsweb.k8s.io/gcs/kubernetes-jenkins/pr-logs/pull/66608/pull-kubernetes-local-e2e/254/artifacts/kubetest-local263115757/

**Release note**:

```release-note
NONE
```

hack/local-up-cluster.sh

@@ -448,6 +448,7 @@ function warning_log {
 
 function start_etcd {
     echo "Starting etcd"
+    ETCD_LOGFILE=${LOG_DIR}/etcd.log
     kube::etcd::start
 }