Merge pull request #54315 from dims/fix-panic-on-kubeproxy-cleanup

Automatic merge from submit-queue (batch tested with PRs 53946, 53993, 54315, 54143, 54532). 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>.

Fix kube-proxy panic on cleanup

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

Set the execer properly when we initialize ProxyServer or we will
end up with a panic.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Fixes #54305

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

cmd/kube-proxy/app/server_others.go

@@ -83,7 +83,12 @@ func NewProxyServer(config *componentconfig.KubeProxyConfiguration, cleanupAndEx
 
 	// We omit creation of pretty much everything if we run in cleanup mode
 	if cleanupAndExit {
-		return &ProxyServer{IptInterface: iptInterface, IpvsInterface: ipvsInterface, CleanupAndExit: cleanupAndExit}, nil
+		return &ProxyServer{
+			execer:         execer,
+			IptInterface:   iptInterface,
+			IpvsInterface:  ipvsInterface,
+			CleanupAndExit: cleanupAndExit,
+		}, nil
 	}
 
 	client, eventClient, err := createClients(config.ClientConnection, master)