add annotations, affinity, nodeselector, tolerations support

[knackaron]

This is specific to the hpe-csi-driver chart. We should be able to define annotations, affinity, nodeSelector, and tolerations for the deployments. These are standard Helm chart features and permit an operator to tailor the deployment to their cluster(s). Specifically, I need to be able to add a toleration for tainted masters to be able to run the node driver. It would be preferable to run the controller on only masters as well. Adding support for these fields would allow an operator to accomplish both of these needs.

The chart values currently don't have much structure, so I wanted to discuss before submitting a PR. The additional values I outlined would need to be configurable for each deployment in the chart, as they could be unique for hpe-csi-controller and hpe-csi-node for example.

[shivamerla]

@knackaron Thanks for your valuable inputs. Please file a PR with your suggestions. We are inclined towards these changes as well.