fix: #5654 by check if both --chart and --chart-ref are set

Signed-off-by: Jesper Axelsen <jesperbaxelsen@gmail.com>

cmd/flux/create_helmrelease_test.go

@@ -42,6 +42,11 @@ func TestCreateHelmRelease(t *testing.T) {
 			args:   "create helmrelease podinfo --export",
 			assert: assertError("chart or chart-ref is required"),
 		},
+		{
+			name:   "chart and chartRef used in combination",
+			args:   "create helmrelease podinfo --chart podinfo --chart-ref foobar/podinfo --export",
+			assert: assertError("cannot use --chart in combination with --chart-ref"),
+		},
 		{
 			name:   "unknown source kind",
 			args:   "create helmrelease podinfo --source foobar/podinfo --chart podinfo --export",