Run test against unreleased version of Redpanda subcharts

Copy the same solution as it was introduced in `TestGoHelmEquivalence` test case.

Reference
redpanda-data/helm-charts@c84b13a

charts/redpanda/chart_template_test.go

@@ -10,15 +10,18 @@
 package redpanda_test
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"log"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"reflect"
 	"regexp"
 	"strings"
 	"testing"
+	"time"
 
 	certmanagerv1 "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
 	jsoniter "github.com/json-iterator/go"
@@ -79,9 +82,40 @@ func TestTemplateHelm310(t *testing.T) {
 
 func TestTemplate(t *testing.T) {
 	ctx := testutil.Context(t)
-	client, err := helm.New(helm.Options{ConfigHome: testutil.TempDir(t)})
+
+	tmp := testutil.TempDir(t)
+
+	pwd, err := os.Getwd()
+	require.NoError(t, err)
+
+	err = CopyFS(tmp, os.DirFS(pwd), "charts")
 	require.NoError(t, err)
 
+	require.NoError(t, os.Remove(filepath.Join(tmp, "Chart.lock")))
+
+	client, err := helm.New(helm.Options{ConfigHome: tmp})
+	require.NoError(t, err)
+
+	ctx, cancel := context.WithTimeout(ctx, 1*time.Minute)
+	defer cancel()
+
+	// As go based resource rendering is hooked with the unreleased console version
+	// any change to the console would end up be blocked by this test. The helm template
+	// would pick the latest console release, so that any change in console would not be
+	// available in `template` function. Just for
+	metadata := redpanda.Chart.Metadata()
+	for _, d := range metadata.Dependencies {
+		d.Repository = fmt.Sprintf("file://%s", filepath.Join(pwd, fmt.Sprintf("../%s", d.Name)))
+	}
+
+	b, err := yaml.Marshal(metadata)
+	require.NoError(t, err)
+
+	err = os.WriteFile(filepath.Join(tmp, "Chart.yaml"), b, os.ModePerm)
+	require.NoError(t, err)
+
+	require.NoError(t, client.DependencyBuild(ctx, tmp))
+
 	archive, err := txtar.ParseFile("testdata/template-cases.txtar")
 	require.NoError(t, err)
 
@@ -105,7 +139,7 @@ func TestTemplate(t *testing.T) {
 			var values map[string]any
 			require.NoError(t, yaml.Unmarshal(tc.Data, &values), "input values are invalid YAML")
 
-			out, renderErr := client.Template(ctx, ".", helm.TemplateOptions{
+			out, renderErr := client.Template(ctx, tmp, helm.TemplateOptions{
 				Name:   "redpanda",
 				Values: values,
 				Set: []string{