cherr-pick(fix,restore): removing annotation openebs.io/created-through from PVC

[mynktl]

Why is this PR required? What issue does it fix?:
This PR is fix for #84 and openebs-archive/maya#1689

What this PR does?:
This PR clears the annotation openebs.io/created-through from restore cstor PVC.
Cherry-pick of #85

Does this PR require any upgrade changes?: No

If the changes in this PR are manually verified, list down the scenarios covered and commands you used for testing with logs:
Following scenario verified

• Created remote backup of percona application, using cstor volume in namespace test, through velero-plugin
  • Created restore from that backup in different namespace ns1
  • Verified that PVC doesn't have annotation openebs.io/created-through
  • Created restic backup for the restored percona application
  • Created restore from that restic backup to different namespace ns2

Output:

• List of PVC

mayank@mayank:~/cloudvm$ kubectl get pvc -A 
NAMESPACE   NAME                       STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS           AGE
ns1         demo-cstor-vol-claim-1     Bound    pvc-d7620526-f982-4cc1-9397-9914a4354dcc   5G         RWO            openebs-cstor-sparse   28m
ns2         demo-cstor-vol-claim-1     Bound    pvc-1245be62-8a12-49b4-b1f2-653995f63613   5G         RWO            openebs-cstor-sparse   4m17s
test        demo-cstor-vol-claim-1     Bound    pvc-4bf06db4-2cba-4c23-998b-f6e3249d4fa6   5G         RWO            openebs-cstor-sparse   96m

• List of CVR

mayank@mayank:~/cloudvm$ kubectl get cvr -n openebs
NAME                                                       USED    ALLOCATED   STATUS    AGE
pvc-1245be62-8a12-49b4-b1f2-653995f63613-cstor-pool-z7ra   36.4M   12.1M       Healthy   4m39s
pvc-4bf06db4-2cba-4c23-998b-f6e3249d4fa6-cstor-pool-z7ra   6.50K   6.50K       Healthy   97m
pvc-d7620526-f982-4cc1-9397-9914a4354dcc-cstor-pool-z7ra   54.7M   16.1M       Healthy   28m

• Annotation in CVR

mayank@mayank:~/cloudvm$ kubectl get cvr pvc-1245be62-8a12-49b4-b1f2-653995f63613-cstor-pool-z7ra   -n openebs  -o json |jq ".metadata.annotations" 
{
  "cstorpool.openebs.io/hostname": "127.0.0.1",
  "isRestoreVol": "false",
  "openebs.io/storage-class-ref": "name: openebs-cstor-sparse\nresourceVersion: 538\n"
}
mayank@mayank:~/cloudvm$ kubectl get cvr pvc-d7620526-f982-4cc1-9397-9914a4354dcc-cstor-pool-z7ra    -n openebs  -o json |jq ".metadata.annotations" 
{
  "cstorpool.openebs.io/hostname": "127.0.0.1",
  "isRestoreVol": "true",
  "openebs.io/storage-class-ref": "name: openebs-cstor-sparse\nresourceVersion: 538\n"
}
mayank@mayank:~/cloudvm$ kubectl get cvr pvc-4bf06db4-2cba-4c23-998b-f6e3249d4fa6-cstor-pool-z7ra     -n openebs  -o json |jq ".metadata.annotations" 
{
  "cstorpool.openebs.io/hostname": "127.0.0.1",
  "isRestoreVol": "false",
  "openebs.io/storage-class-ref": "name: openebs-cstor-sparse\nresourceVersion: 538\n"
}

• PVC Annotations

mayank@mayank:~/cloudvm$ kubectl get pvc demo-cstor-vol-claim-1 -n ns1  -o json |jq ".metadata.annotations" 
{
  "pv.kubernetes.io/bind-completed": "yes",
  "pv.kubernetes.io/bound-by-controller": "yes",
  "volume.beta.kubernetes.io/storage-provisioner": "openebs.io/provisioner-iscsi"
}
mayank@mayank:~/cloudvm$ kubectl get pvc demo-cstor-vol-claim-1 -n ns2  -o json |jq ".metadata.annotations" 
{
  "pv.kubernetes.io/bind-completed": "yes",
  "pv.kubernetes.io/bound-by-controller": "yes",
  "volume.beta.kubernetes.io/storage-provisioner": "openebs.io/provisioner-iscsi"
}
mayank@mayank:~/cloudvm$ kubectl get pvc demo-cstor-vol-claim-1 -n test  -o json |jq ".metadata.annotations" 
{
  "kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"v1\",\"kind\":\"PersistentVolumeClaim\",\"metadata\":{\"annotations\":{},\"name\":\"demo-cstor-vol-claim-1\",\"namespace\":\"test\"},\"spec\":{\"accessModes\":[\"ReadWriteOnce\"],\"resources\":{\"requests\":{\"storage\":\"5G\"}},\"storageClassName\":\"openebs-cstor-sparse\"}}\n",
  "pv.kubernetes.io/bind-completed": "yes",
  "pv.kubernetes.io/bound-by-controller": "yes",
  "volume.beta.kubernetes.io/storage-provisioner": "openebs.io/provisioner-iscsi"
}

Checklist:

• Fixes #Remove PVC annotation openebs.io/created-through once restore completes #84 restic restore failed for cstor volume openebs-archive/maya#1689
• PR Title follows the convention of <type>(<scope>): <subject>
• Has the change log section been updated?
• Commit has integration tests
• (Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
• (Optional) If documentation changes are required, which issue on https://github.com/openebs/openebs-docs is used to track them:

Signed-off-by: mayank mayank.patel@mayadata.io