[v2.10] rancher-backup start using rancher/kuberlr-kubectl

[mallardduck]

See example issue: #652
For example PR and notes about how BRO chart will release for this.

[omkarkhatavkar]

@jbiers I believe we need to do chart release to test this ? I can not see changes on the the rancher 2.10.4-alpha1

[omkarkhatavkar]

📝 Rancher Backup & Restore Testing

Rancher Version: v2.10.4-alpha1
Cluster Version: v1.31.5-rc1+rke2r1
Rancher Backup and Restore Version: 105.0.1+up6.0.1-rc.1

✅ Installation Verification

• Installed the rancher-backup-restore chart (105.0.1+up6.0.1-rc.1) on Rancher v2.10.4-alpha1.
• Verified that the rancher-backup-patch-sa job is using the rancher/kuberlr-kubectl image successfully.
• No errors were encountered during installation.

🔄 Backup and Restore Testing

• Tested in-place backup and restore with both encrypted and non-encrypted backups.
• The backup and restore processes worked as expected. ✅