Controller refactor to use dynamic client instead of generated code

[abhilashshetty04]

This project uses controllers which watches over 3 cr's. Controller plugin(lvmnodes). Node plugin(lvmvolumes, lvmnodes, lvmsnapshots)

Currently all these controllers are using generated code to implement client. We could use dynamic client from client-go which would reduce code foot prints and will make code more readable as well. In addition to that i am adding only 1 method which would create and return controllers as opposed to using multiple methods to build controller.

Progress on each controller:

Node plugin:

• [x] lvmvolumes : Refactored and tested. WIP pr is raised
• [x] lvmnodes : Refactored and tested. WIP pr is raised
• [x] lvmsnapshots: Refactored and tested. WIP pr is raised

Controller plugin:

• [ ] lvmnodes : Yet to start

PR: https://github.com/openebs/lvm-localpv/pull/186

[abhilashshetty04]

Pr is merged. Closing the issue.