fix(restore): set targetip on CVRs after restore is completed

[zlymeda]

Auto-setting of targetip on CVR if openebs.io/restore-completed is found

Pull Request template

Why is this PR required? What issue does it fix?:
Currently, users have to set targetip on CVRs after restore. Corresponding change in openebs/velero-plugin#131 will mark CVRs which needs to update the targetip. Changes in this PR will check the annotation and set the targetip.

What this PR does?:
Sets targetip on CVRs marked with openebs.io/restore-completed annotation.

Does this PR require any upgrade changes?:
No

If the changes in this PR are manually verified, list down the scenarios covered::
make test in velero-plugin repository with changes deployed.

Any additional information for your reviewer? :
Mention if this PR is part of any design or a continuation of previous PRs

related velero-plugin PR: openebs/velero-plugin#131
related cstor-operators PR: openebs-archive/cstor-operators#198

Checklist:

• Fixes After a restore, cStorVolume remains in Init, CVRs remain in Error state openebs/velero-plugin#127
• PR Title follows the convention of <type>(<scope>): <subject>
• Has the change log section been updated?
• Commit has unit tests
• 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:

[mynktl]

Thanks for the PR @zlymeda .
PR looks good. Given one comment about logging the error. PTAL.

[mittachaitu]

Changes are good

[zlymeda]

I rebased with origin/master and squashed commits into single commit