fix(charts): Change lvm-controller's Kind from StatefulSet to Deployment (#196)

[evgkrsk]

Pull Request template

Why is this PR required? What issue does it fix?:

This PR address #196 issue and tries to avoid lvm-controller's disruption if underlaying node(s) crashed. Deployment's controller will restart failed pod(s) on healthy node, unlike StatefulSet's controller.

What this PR does?:

It change lvm-controller's Kind from StatefuleSet to Deployment.

Does this PR require any upgrade changes?:

No, as far as I know.

If the changes in this PR are manually verified, list down the scenarios covered::

• Helm release migration from sts to deployment (LE, 2 replicas).

Checklist:

• Fixes Why does openebs-lvm-controller use StatefulSet ? #196
• 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:

[Abhinandan-Purkait]

Closing since it's cherry-picked in #284