test(template): reset global CLI settings in OCI output test

Add defer resetEnv()() so the test isolates the package-global settings/env,
matching the other cmd tests and avoiding order-dependent flakiness.

Signed-off-by: Seonghyun Hong <s3onghyun.hong@gmail.com>

pkg/cmd/template_test.go

@@ -185,6 +185,8 @@ func TestTemplateCmd(t *testing.T) {
 // diagnostic messages (e.g. "Pulled:" / "Digest:") emitted while fetching an OCI
 // chart do not leak into the rendered manifest stream on stdout. See helm/helm#32215.
 func TestTemplateOCIRegistryOutputNotInManifest(t *testing.T) {
+	defer resetEnv()()
+
 	srv := repotest.NewTempServer(
 		t,
 		repotest.WithChartSourceGlob("testdata/testcharts/*.tgz*"),