cli: fix upgrades when using outdated Kubernetes patch version (#2718)

* Fix missing image for Constellation operators in our Helm charts if the desired Kubernetes patch version is no longer supported (but Kubernetes upgrades are skipped)
* Correctly unmarshal Kubernetes Components list if the list uses an old format

---------

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

internal/versions/components/components_test.go

@@ -0,0 +1,31 @@
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+package components
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestUnmarshalComponents(t *testing.T) {
+	assert := assert.New(t)
+	require := require.New(t)
+
+	legacyFormat := `[{"URL":"https://example.com/foo.tar.gz","Hash":"1234567890","InstallPath":"/foo","Extract":true}]`
+	newFormat := `[{"url":"https://example.com/foo.tar.gz","hash":"1234567890","install_path":"/foo","extract":true}]`
+
+	var fromLegacy Components
+	require.NoError(json.Unmarshal([]byte(legacyFormat), &fromLegacy))
+
+	var fromNew Components
+	require.NoError(json.Unmarshal([]byte(newFormat), &fromNew))
+
+	assert.Equal(fromLegacy, fromNew)
+}