Update CCM deployment manifest to use Kustomize

[thorn3r]

The Linode blockstorage CSI driver's deployment manifest is generated using Kustomize. Currently, the CCM uses a shell script to generate the CCM manifest. It would be nice to update the CCM manifest to use Kustomize, to be in-line with the Linode CSI.

Here is an example of a kustomize plugin which allows dynamic generation of kustomize manifests, which may be helpful in providing some of the functionality of the current shell script, such as inserting tokens: https://github.com/asauber/kustomize-pubkey