[#8597] Fix image not found (#8604)

### What changes were proposed in this pull request?

1. Change MySQL repository to bitnamilegacy
2. Verify Kubenetes 1.28 support

### Why are the changes needed?

Fix: #8597

### Does this PR introduce _any_ user-facing change?

N/A

### How was this patch tested?

Chart testing CI

Co-authored-by: Danhua Wang <danhua@datastrato.com>

Author: github-actions[bot]

dev/charts/gravitino/Chart.yaml

@@ -32,7 +32,7 @@ dependencies:
     name: mysql
     repository: https://charts.bitnami.com/bitnami
     version: 10.2.1
-kubeVersion: '>=1.29.0-0'
+kubeVersion: '>=1.28.0-0'
 maintainers:
   - name: Gravitino
     email: dev@gravitino.apache.org

dev/charts/gravitino/values.yaml

@@ -48,6 +48,7 @@ mysql:
   ## @param image.tag MySQL image tag
   ##
   image:
+    repository: bitnamilegacy/mysql
     tag: 8.0.36-debian-12-r12
   ## MySQL Authentication parameters
   ##