test: Speed up iso test with --no-kubernetes

We don't need to start kubernetes for testing the ISO. On macOS the test
is 2.45 times faster (from 17.137 seconds to 6.974 seconds).

Before:

    % go test -v ./test/integration -run TestISO -tags integration -count 1
    ...
    --- PASS: TestISOImage (16.27s)
        --- PASS: TestISOImage/Setup (15.76s)
        --- PASS: TestISOImage/Binaries (0.00s)
            --- PASS: TestISOImage/Binaries/crictl (0.08s)
            --- PASS: TestISOImage/Binaries/podman (0.09s)
            --- PASS: TestISOImage/Binaries/rsync (0.11s)
            --- PASS: TestISOImage/Binaries/docker (0.11s)
            --- PASS: TestISOImage/Binaries/iptables (0.11s)
            --- PASS: TestISOImage/Binaries/git (0.12s)
            --- PASS: TestISOImage/Binaries/socat (0.08s)
            --- PASS: TestISOImage/Binaries/curl (0.08s)
            --- PASS: TestISOImage/Binaries/wget (0.08s)
        --- PASS: TestISOImage/PersistentMounts (0.00s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/toolbox (0.08s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/boot2docker (0.09s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/cni (0.09s)
            --- PASS: TestISOImage/PersistentMounts//data (0.10s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/kubelet (0.10s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/minikube (0.11s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/docker (0.07s)
    PASS
    Tests completed in 16.268875292s (result code 0)
    ok  	k8s.io/minikube/test/integration	17.137s

After:

    % go test -v ./test/integration -run TestISO -tags integration -count 1
    ...
    --- PASS: TestISOImage (5.77s)
        --- PASS: TestISOImage/Setup (5.30s)
        --- PASS: TestISOImage/Binaries (0.00s)
            --- PASS: TestISOImage/Binaries/wget (0.09s)
            --- PASS: TestISOImage/Binaries/socat (0.09s)
            --- PASS: TestISOImage/Binaries/iptables (0.10s)
            --- PASS: TestISOImage/Binaries/podman (0.10s)
            --- PASS: TestISOImage/Binaries/crictl (0.11s)
            --- PASS: TestISOImage/Binaries/git (0.11s)
            --- PASS: TestISOImage/Binaries/rsync (0.07s)
            --- PASS: TestISOImage/Binaries/docker (0.08s)
            --- PASS: TestISOImage/Binaries/curl (0.08s)
        --- PASS: TestISOImage/PersistentMounts (0.00s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/toolbox (0.08s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/boot2docker (0.09s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/cni (0.09s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/minikube (0.10s)
            --- PASS: TestISOImage/PersistentMounts//data (0.10s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/docker (0.11s)
            --- PASS: TestISOImage/PersistentMounts//var/lib/kubelet (0.07s)
    PASS
    Tests completed in 5.7657725s (result code 0)
    ok  	k8s.io/minikube/test/integration	6.974s

Author: nirs

test/integration/iso_test.go

@@ -23,7 +23,6 @@ import (
 	"fmt"
 	"os/exec"
 	"runtime"
-	"strings"
 	"testing"
 
 	"k8s.io/minikube/pkg/minikube/vmpath"
@@ -42,15 +41,11 @@ func TestISOImage(t *testing.T) {
 	defer CleanupWithLogs(t, profile, cancel)
 
 	t.Run("Setup", func(t *testing.T) {
-		args := append([]string{"start", "-p", profile, "--install-addons=false", "--memory=3072", "--wait=false", "--disable-metrics=true"}, StartArgs()...)
+		args := append([]string{"start", "-p", profile, "--no-kubernetes"}, StartArgs()...)
 		rr, err := Run(t, exec.CommandContext(ctx, Target(), args...))
 		if err != nil {
 			t.Errorf("failed to start minikube: args %q: %v", rr.Command(), err)
 		}
-
-		if strings.Contains(rr.Stderr.String(), "kubelet.housekeeping-interval=5m") {
-			t.Error("--disable-metrics=true is not working, housekeeping interval not increased")
-		}
 	})
 
 	// Run as a group so that our defer doesn't happen as tests are runnings