Use errors.New instead of fmt.Errorf

[GunaKKIBM]

To frame errors it is better to use errors.New instead of fmt.Errorf

Here's a comment in one of the PRs for reference: https://github.com/kubernetes-sigs/ibm-powervs-block-csi-driver/pull/746#discussion_r1768706207

[irapandey]

@GunaKKIBM - Can I take this up if you haven't tstarted? Would give time to look around the codebase as well :)

[irapandey]

/assign

[GunaKKIBM]

Sure @irapandey. You may assign it to yourself