Automatic merge from submit-queue (batch tested with PRs 44606, 46038)
Add ip-masq-agent addon to the addons folder.
This also ensures that under gce we add this DaemonSet if the non-masq-cidr
is set to 0/0.
**What this PR does / why we need it**:
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
Add ip-masq-agent addon to the addons folder which is used in GCE if --non-masquerade-cidr is set to 0/0
```
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The scripts and data in this directory automate creation and configuration of a Kubernetes cluster, including networking, DNS, nodes, and master components.