test(e2e): squash helm tests (backport of #11901) (#12310)

Automatic cherry-pick of #11901 for branch release-2.6

Generated by
[action](https://github.com/kumahq/kuma/actions/runs/12375804596)

cherry-picked commit a649d8e
⚠️ ⚠️ ⚠️ Conflicts happened when cherry-picking!
⚠️ ⚠️ ⚠️
```
On branch release-2.6
Your branch is up to date with 'origin/release-2.6'.

You are currently cherry-picking commit a649d8e.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   test/e2e/bootstrap/corefile_template.go
	deleted:    test/e2e/helm/kuma_helm_deploy_multi_apps.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   test/e2e/helm/e2e_suite_test.go

```

---------

Signed-off-by: Jakub Dyszkiewicz <jakub.dyszkiewicz@gmail.com>
Signed-off-by: Lukasz Dziedziak <lukidzi@gmail.com>
Co-authored-by: Jakub Dyszkiewicz <jakub.dyszkiewicz@gmail.com>
Co-authored-by: Lukasz Dziedziak <lukidzi@gmail.com>

test/e2e/bootstrap/corefile_template.go

@@ -2,6 +2,7 @@ package bootstrap
 
 import (
 	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/gruntwork-io/terratest/modules/random"
@@ -35,6 +36,7 @@ data:
 	}
 
 	dnsConfigDir := "/tmp/kuma-dp-config/coredns"
+	minReplicas := 3
 	BeforeAll(func() {
 		k8sCluster = NewK8sCluster(NewTestingT(), Kuma1, Silent)
 
@@ -49,6 +51,8 @@ data:
 				WithHelmOpt("controlPlane.extraConfigMaps[0].name", configMapName),
 				WithHelmOpt("controlPlane.extraConfigMaps[0].mountPath", dnsConfigDir),
 				WithHelmOpt("controlPlane.extraConfigMaps[0].readonly", "false"),
+				WithHelmOpt("controlPlane.autoscaling.enabled", "true"),
+				WithHelmOpt("controlPlane.autoscaling.minReplicas", strconv.Itoa(minReplicas)),
 			)).
 			Install(MeshKubernetes("default")).
 			Install(NamespaceWithSidecarInjection(appNamespace)).
@@ -69,6 +73,10 @@ data:
 		Expect(k8sCluster.DismissCluster()).To(Succeed())
 	})
 
+	It("should deploy 3 CP replicas", func() {
+		Expect(k8sCluster.WaitApp(Config.KumaServiceName, Config.KumaNamespace, minReplicas)).To(Succeed())
+	})
+
 	It("should use Corefile template from control plane at data plane", func() {
 		dpPod, err := PodNameOfApp(k8sCluster, appName, appNamespace)
 		Expect(err).ToNot(HaveOccurred())

test/e2e/helm/e2e_suite_test.go

@@ -19,7 +19,6 @@ var (
 	// Skipped as it fails with: error while running command: exit status 1; Error: INSTALLATION FAILED: rendered manifests contain a resource that already exists. Unable to continue with install: ServiceAccount "kuma-control-plane" in namespace "kuma-system" exists and cannot be imported into the current release: invalid ownership metadata; annotation validation error: key "meta.helm.sh/release-name" must equal "kuma-c0vo8o": current value is "kuma-8yy3uv"
 	// Likely something needs to be improved to be able to run this test
 	_ = PDescribe("Test Global and Zone universal mode with Helm chart", Label("job-0"), helm.GlobalAndZoneInUniversalModeWithHelmChart, Ordered)
-	_ = Describe("Test App deployment with Helm chart", Label("job-2"), helm.AppDeploymentWithHelmChart)
 	_ = Describe("Test upgrading Standalone with Helm chart", Label("job-2"), helm.UpgradingWithHelmChartStandalone, Ordered)
 	_ = Describe("Test upgrading Multizone with Helm chart", Label("job-2"), helm.UpgradingWithHelmChartMultizone, Ordered)
 )