feat: Fine tune (Part 9) - Handling image data destination (kaito-pro…

…ject#367)

**Reason for Change**:
Sets up the data destination outline. This PR introduces image as first
data destination. It includes sidecar container script for detecting
finished fine tuning results and uploading results to image data
destination

PR also fixes a flaky test - caused by environment variables getting
carried over between tests.

pkg/tuning/preset-tuning.go

@@ -3,13 +3,14 @@ package tuning
 import (
 	"context"
 	"fmt"
-	"k8s.io/apimachinery/pkg/runtime"
-	"k8s.io/utils/pointer"
-	"knative.dev/pkg/apis"
 	"os"
 	"path/filepath"
 	"strings"
 
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/utils/pointer"
+	"knative.dev/pkg/apis"
+
 	"k8s.io/apimachinery/pkg/api/resource"
 
 	kaitov1alpha1 "github.com/azure/kaito/api/v1alpha1"