tests: rename "kubectl" setupTestNamespace

As the other version has a different signature, but exists for a
different build tag. Resulting in my IDE becoming absolutely confused
when I tried to enable both at the same time. Opted for "exec" because
this one shells out.

Signed-off-by: Hidde Beydals <hello@hidde.co>

cmd/flux/helmrelease_test.go

@@ -23,7 +23,7 @@ import "testing"
 
 func TestHelmReleaseFromGit(t *testing.T) {
 	namespace := allocateNamespace("thrfg")
-	del, err := setupTestNamespace(namespace)
+	del, err := execSetupTestNamespace(namespace)
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/flux/image_test.go

@@ -23,7 +23,7 @@ import "testing"
 
 func TestImageScanning(t *testing.T) {
 	namespace := allocateNamespace("tis")
-	del, err := setupTestNamespace(namespace)
+	del, err := execSetupTestNamespace(namespace)
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/flux/kustomization_test.go

@@ -23,7 +23,7 @@ import "testing"
 
 func TestKustomizationFromGit(t *testing.T) {
 	namespace := allocateNamespace("tkfg")
-	del, err := setupTestNamespace(namespace)
+	del, err := execSetupTestNamespace(namespace)
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/flux/main_e2e_test.go

@@ -65,7 +65,7 @@ func TestMain(m *testing.M) {
 	os.Exit(code)
 }
 
-func setupTestNamespace(namespace string) (func(), error) {
+func execSetupTestNamespace(namespace string) (func(), error) {
 	kubectlArgs := []string{"create", "namespace", namespace}
 	_, err := utils.ExecKubectlCommand(context.TODO(), utils.ModeStderrOS, *kubeconfigArgs.KubeConfig, *kubeconfigArgs.Context, kubectlArgs...)
 	if err != nil {

cmd/flux/source_oci_test.go

@@ -25,7 +25,7 @@ import (
 
 func TestSourceOCI(t *testing.T) {
 	namespace := allocateNamespace("oci-test")
-	del, err := setupTestNamespace(namespace)
+	del, err := execSetupTestNamespace(namespace)
 	if err != nil {
 		t.Fatal(err)
 	}